Identify the segment in the sentence which contains the grammatical error from the given options.
We couldn't understand they because they were talking in Chinese.

Options

A. We couldn't understand
B. they were talking
C. they because
D. in Chinese

Answer

C

Explanation

Them is a pronoun that is used for the people or things mentioned earlier. In the given sentence, them. will be used for the people who were talking in Chinese. Hence, .them because. will be answer.