hazelnut wrote:
Though research remains to be done into the reasons why the Civil War was triggered, scholars do not regard slavery to be the sole cause.
(A) Though research remains to be done into the reasons why the Civil War was triggered, scholars do not regard slavery to be the sole cause.
(B) Though research remains to be done into what triggered the Civil War, scholars do not regard slavery as the sole cause.
(C) Though the reasons that triggered the Civil War remain to be researched, slavery is not regarded by scholars to be the sole cause.
(D) Despite research remaining into the reasons why the Civil War was triggered, scholars do not regard slavery as the sole cause.
(E) Scholars do not regard slavery as the sole cause of the Civil War, though the reasons for it being triggered remain to be researched.
Official Explanation from Manhattan Prep
The original sentence contains the wordy and awkward construction "the reasons why the Civil War was triggered." Also, the correct idiom is "regard X as Y", not "regard X to be Y".
(A) This choice is incorrect as it repeats the original sentence.
(B) CORRECT. This choice uses the concise phrase "what triggered the Civil War" and uses the idiomatic phrase "regard slavery as the sole cause" (regard X as Y).
(C) This choice incorrectly uses the unidiomatic "slavery is not regarded . . . to be the sole cause." Also, the main clause has been rewritten in the passive voice unnecessarily.
(D) This choice contains the redundancy "reasons why" and the awkward phrasing "despite research remaining."
(E) This choice incorrectly introduces an ambiguous pronoun ("it") that could refer either to slavery or to the Civil War.
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