manishtank1988 wrote:
What caused the $100 million museum's approval and construction to take 12 years was a combination of the complexity of the financing requirements and the opposition of several small but vocal constituencies.
A)What caused
B)What has caused
C)The thing that caused
D)That which caused
E)Causing
Official answer -
Read the Original Sentence Carefully, Looking for Errors:
The sentence as written contains no errors. The singular relative pronoun "what" is properly used to refer to the singular "a combination": "What caused [these things to happen] was a combination [of other things]." The past tense "caused" is correct, as it matches the non-underlined past tense "was." Plan on selecting (A), but check the other choices to make sure nothing was overlooked.
Scan and Group the Answer Choices:
A quick scan does not reveal any patterns that lead to a useful grouping. The choices are short, so just proceed to analyze them more carefully.
Eliminate Wrong Answer Choices:
(B) uses the present perfect "has caused," which is not parallel to the past tense "was." Had the sentence said has been a combination ..., then "has caused" would have been parallel. Eliminate (B).
(C) replaces "what" with "the thing that." While this is not grammatically incorrect, it is unnecessarily wordy. Eliminate (C).(D) replaces "what" with "that which." This is not grammatically incorrect, but it is a less common wording in modern English and it uses two words where one would do. Since there is no reason to switch from "what" to "that which," eliminate (D).
(E) uses the wrong verb tense with "causing." This can be seen by rearranging the original sentence to read A combination of ... was what caused the ... But (E) would read A combination of ... was causing the ..., which distorts the meaning of the sentence. The sentence wants to describe events that happened and were completed in the past. The simple past tense, "was" and "caused," is appropriate here.
As expected, (A) is correct.
TAKEAWAY: Don‘t forget that (A) is correct about 20 percent of the time, just like each of the other choices. Don't be so eager to find errors that you “find” mistakes that aren’t there.