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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. He would not listen to us at all

B. and it was quite apparent that

C. he had other different sources of information

D. than what we were relying on

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