Climate researchers examined sediments | GMAT | Verbal | CR | Hard | GFE Mock

Posted by Payal Tandon | Jul 18, 2024 | CR OG Solutions, GMAT OG Solutions, GMAT Preparation

A 2 min read

Question

Climate researchers examined sediments in a cave in Region Z, which now has a temperate climate, and they found arctic lemming bones in a buried layer corresponding to about 14,000 B.C. Arctic lemmings are typical of arctic climates …

Solution : Climate researchers examined sediments …

Watch the video solution to see “Pre-think Assumptions” approach come to life on this question.

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Question Attributes

Source: Official Mocks
Difficulty Level: Hard – 57% accuracy
Question Type: Critical Reasoning

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Summary: Climate researchers examined sediments …

To master CR questions, adhere to the following steps:

Thoroughly Understand the Passage and Identify Key Information by actively translating, drawing inferences, and visualizing.
Identify the Assumptions: Determine what assumptions are necessary for the conclusion to hold true.
Pre-think Possible Assumptions: Before looking at the answer choices, list potential assumptions that could strengthen the conclusion.
Analyze Answer Choices:
- Compare each answer choice against the pre-thought assumptions.
- Check if the choice is necessary for the conclusion to hold true.
- Eliminate irrelevant or incorrect choices that do not support the conclusion or are not must-be-true assumptions.

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About The Author

Payal Tandon

Payal Tandon, co-founder and COO of e-GMAT, has revolutionized GMAT preparation through her innovative, process-driven teaching methodology that has helped over 50,000 students achieve their dream scores since 2010. From the very beginning, Payal laid the foundation of e-GMAT's success by instilling a process-driven approach to GMAT preparation, becoming a Six Sigma aficionado who believes in "doing things right the first time. Her quantifiable impact speaks for itself: on GMAT Club—the largest online GMAT forum—she is ranked as the #1 rated GMAT expert globally, with e-GMAT maintaining over 1,800 reviews and Payal sustaining a 4.8/5 instructor rating as of 2024-25. Payal holds a Bachelor's degree in Chemical Engineering from the prestigious BITS Pilani and brings analytical rigor from her engineering career at Honeywell, where her experience managing complex projects—including multi-million dollar NASA programs—instilled the systematic precision she now applies to GMAT instruction. Her GMAT expertise spans across all sections of the test, with particular specialization in verbal sections where she pioneered her signature "pre-thinking strategy" for Critical Reasoning, while also introducing a novel framework of six core "process skills" for Quantitative reasoning and innovative approaches for the new Data Insights section that help students systematically tackle problems rather than relying on brute-force repetition. Passionate about education, Payal left her lucrative engineering career to pursue her vision of making quality GMAT preparation accessible to all, believing that students should "give 200% or don't take on the task at all"—a philosophy that permeates every aspect of her teaching. Her success metrics speak volumes: e-GMAT delivers more 700+ scores than any other prep provider, with students consistently crediting her strategies for dramatic score improvements. She has authored over 2,000 GMAT practice questions, conducted 1,000+ hours of webinars, and regularly contributes strategic articles to the e-GMAT blog.