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
A. Correct. What caused X and Y was a combination of something.
B. Present perfect "has" is wrong here.
C. Principal clause here is "The thing was a combination of something". This is nonsensical.
D. That - which does not makes sense.
E. Causing X and Y was a combination. Wrong
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