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In each of these questions, a sentence has been divided into four parts and marked a. b, c and d. One of these parts contains a mistake in grammar Idiom or syntax. Identify that part and mark it as the answer.

A. Despite all the threatening and cajoling

B. the accused denied to disclose

C. who his accomplices were

D. in the bank robbery (theft of the banks cash).

Please do not use chat terms. Example: avoid using "grt" instead of "great".