Pls explain the error in the concept being tested

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Pls explain the error in the concept being tested

by [email protected] » Thu Jan 30, 2014 10:14 pm

Hi Experts,

Pls help me with my confusion between C & D

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Source: Beat The GMAT — Sentence Correction | Thu Jan 30, 2014 10:14 pm

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by [email protected] » Thu Jan 30, 2014 11:56 pm

Hi shisriz,

In this SC, the subject is "narwhals" (the whales of the ice). Since some people don't know that "narwhals" are living creatures, the rest of the sentence provides context clues to help you choose the correct answer. Those clues are the words "they seek..." and "their chief predator." Since those two plural pronouns are consistent, the third phrase should be parallel: "THEIR migrations follow..."

Final Answer: C

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