While the CEO was the public face of the corporation, the Board of Directors made all the critical decisions _________ closed doors.
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writingWhich choice completes the text so that it conforms to the conventions of Standard English?
A
between
B
under
C
across
D
behind
Correct Answer: D
Choice D is the best answer. The idiom "behind closed doors" means in private or secret.
Choice A is incorrect because "between closed doors" implies location, not the idiom for privacy. Choice B is incorrect because "under closed doors" is not a valid expression. Choice C is incorrect because "across closed doors" is not a valid expression.