F: How are your Chinese lessons going? ,M: Oh, I'm learning very slowly. I think Chinese is more difficult than English and French.
(A) F: Really. I thought it is more challenging for you to learn English, rather than Chinese. (B) F: It's normal. Chinese is more difficult. But you are learning very quickly. (C) F: That's true. Chinese is more challenging. (D) F: I am sorry. You spoke so rapidly that I did not catch the meaning of what you said. Could you repeat that?
C