Question: Like many other theropods discovered in the Yixian Formation, a coat of filamentous structures was preserved with the fossil skeleton, which are commonly recognized as the precursors of feathers.

(A) a coat of filamentous structures was preserved with the fossil skeleton, which are commonly recognized as the precursors of feathers.
(B) the fossil skeleton had been preserved with a coat of filamentous structures, which are commonly recognized as the precursors of feathers.
(C) the fossil skeleton was preserved with a coat of filamentous structures commonly recognized as the precursors of feathers.
(D) a coat of filamentous structures, which are commonly recognized as the precursors of feathers, had been preserved with the fossil skeleton.
(E) a coat of filamentous structures, commonly recognized as the precursors of feathers, was preserved with the fossil skeleton.

Correct Answer: C
Explanation:

This line of thinking could support the recommended language modification:

• Parallelism
• Considering two separate truths
• Modifiers

Given that, Idealistically, a career diplomat should assist in sustaining a successful American foreign policy throughout changes in leadership.

A: Incorrect

This choice is an incorrect one. In this instance, the skeleton is incorrectly modified by the addition of "which are" after the comma. Therefore, it is not acceptable.

B: Incorrect

B is an incorrect choice. The use of 'had been' so early on in the sentence is inappropriate.

C: Correct

This is the correct choice. The fossilized skeleton was covered in filamentous filaments that are typically thought of as the forerunners of feathers.

D: Incorrect

It is an incorrect choice. The use of 'had been' so early on in the sentence is inappropriate.

E: Incorrect

It is an incorrect choice. The roles are reversed. I.e., the filamentous structures provide a coat to the fossil skeleton, not the skeleton itself, which acts as a coat of them.

“Like many other theropods discovered in the Yixian Formation, a coat” - is a GMAT sentence correction question. The text that is underlined in these questions has grammatical mistakes, and we must select the right response from the list of possibilities. The GMAT verbal section includes GMAT sentence correction.

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