Cicada Emergence

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North American cicadas always garner attention when they come above ground at the end of their 17-year life cycle, but in no case were they as well studied as was their emergence during the 1920s, when the naturalist William T. Davis studied them in detail.

Review: Cicada Emergence


Explanation

Creating a filter: the original question contains a comparison. To examine this comparison more closely, we can ignore the first portion of the sentence; then we have, "In no case were they as well studied as..." Logically, the construction is like, "X was as well studied as Y," where X equals "in no case." Y could equal something like, "in this case," "in every other case," or "in the 1920s," but it must start with the preposition "in" to be parallel.

Applying the filter: The correct answer is (C).


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