Mark the letter A, B, C, or D on your answer sheet...

Câu hỏi: Mark the letter A, B, C, or D on your answer sheet to indicate the correct answer to each of the following questions.
What I can't understand is why he is now pursuing our daughter and why he has not told her that he was once acquainted ........ us.

A. to

B. with

C. for

D. of