F: It's too difficult for me to keep up with my classmates. ,M: You should play less and study more I'm afraid.
(A) F: Yes. I should have played more and relaxed myself because I have kept up with my classmates. (B) F: Yes. Maybe I have studied too much. I should relax myself because I have kept up with my classmates. (C) F: I guess you are right. I didn't study hard enough. (D) F: Excuse me, could you repeat the question?
C