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Early post-Pleistocene hunter-gatherers of the Middle East and Europe sought to compensate for shortages of the animals and plants on...

GMAT Critical Reasoning : (CR) Questions

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Critical Reasoning
Inference
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Early post-Pleistocene hunter-gatherers of the Middle East and Europe sought to compensate for shortages of the animals and plants on which they subsisted by learning to plant crops and domesticate animals. But such agricultural practices often required clearing the forest lands that those animals and plants had needed in order to flourish.

The statements above most logically lead to which of the following as a conclusion?

A
Adoption of agricultural practices by human beings was advantageous for some nonhuman species but made others extinct.
B
Adoption of agricultural practices by human beings required advances in techniques for making tools.
C
Adoption of agricultural practices by human beings enabled them to live lifelong in one location.
D
Adoption of the agricultural lifestyle forced major changes in the family structures of human communities.
E
Adoption of the agricultural lifestyle by human beings may have eventually exacerbated a problem that it had initially helped to mitigate.
Solution

Passage Visualization

Passage Statement Visualization and Linkage
Early post-Pleistocene hunter-gatherers of the Middle East and Europe sought to compensate for shortages of the animals and plants on which they subsisted by learning to plant crops and domesticate animals. Establishes: Initial problem and solution attempt

Concrete Example:
  • Original food sources: 100 units of wild animals/plants needed
  • Shortage scenario: Only 60 units available
  • Solution attempt: Develop agriculture to replace 40 missing units
Key Pattern: Compensatory behavior - replacing lost resources with new methods
But such agricultural practices often required clearing the forest lands that those animals and plants had needed in order to flourish. Establishes: Contradiction in the solution

Concrete Example:
  • Agriculture requires: 30 acres of cleared forest land
  • Same 30 acres previously supported: 25 units of wild animals/plants
  • Action destroys the very resources it aims to replace
Logical Connection: The word "But" signals that this contradicts the previous solution
Overall Implication Self-Defeating Solution Paradox:

Hunter-gatherers faced a circular problem:
  1. Started with shortage of wild food (60/100 units)
  2. Adopted agriculture to compensate (+40 units potential)
  3. Agriculture destroyed habitat (-25 units of original sources)
  4. Net effect: Solution potentially worsens the original problem
Core Pattern: The remedy undermines itself by destroying what it seeks to replace

Valid Inferences

Inference: The hunter-gatherers' solution to food shortages was self-defeating because it destroyed the very resources they were trying to replace.

Supporting Logic: Since the hunter-gatherers adopted agriculture to compensate for shortages of wild animals and plants, and since agricultural practices required clearing the forest lands that those same animals and plants needed to flourish, the solution directly undermined the original food sources. Therefore, the agricultural solution worked against its own purpose by eliminating the habitat necessary for the wild resources it was meant to supplement.

Clarification Note: The passage establishes this logical contradiction but does not specify whether agriculture ultimately provided a net benefit or loss - only that it created this inherent conflict between the solution and the original problem.

Answer Choices Explained
A
Adoption of agricultural practices by human beings was advantageous for some nonhuman species but made others extinct.

This choice discusses advantages for some species and extinction for others, but the passage doesn't provide information about which specific species benefited or went extinct. We only know that agriculture cleared forest lands needed by the animals and plants that hunter-gatherers originally relied on. The passage doesn't support conclusions about differential impacts on various species.

B
Adoption of agricultural practices by human beings required advances in techniques for making tools.

The passage makes no mention of tool-making techniques or technological advances. While agriculture might logically require tools, this inference goes beyond what we can conclude from the given information. The passage focuses on the relationship between food shortages, agricultural adoption, and habitat destruction.

C
Adoption of agricultural practices by human beings enabled them to live lifelong in one location.

The passage doesn't discuss settlement patterns or whether people stayed in one location. The focus is entirely on the food production methods and their environmental consequences, not on lifestyle changes related to mobility or permanent settlement.

D
Adoption of the agricultural lifestyle forced major changes in the family structures of human communities.

Family structure changes are completely outside the scope of this passage. The argument centers on the relationship between agricultural practices and their impact on the natural resources that agriculture was meant to replace, not on social organizational changes.

E
Adoption of the agricultural lifestyle by human beings may have eventually exacerbated a problem that it had initially helped to mitigate.

This correctly captures the logical progression in the passage. Hunter-gatherers faced shortages (the problem), adopted agriculture to compensate (initially helped mitigate), but agriculture required clearing forest lands needed by the original animals and plants (eventually exacerbated the problem). This creates the paradox where the solution potentially worsens the original issue by destroying the habitat for the very resources it was meant to supplement.

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