Given the task definition and input, reply with output. In this task you are given a small conversation between two persons and 4 options on how the conversation should continue. Your job is to choose the most reasonable option. The conversation and the options are separated by a newline character. Each dialogue in the conversation are separated by a comma. F and M indicate female and male, respectively.

F: David, where did you get so many old books? ,M: Some graduates were selling their used books. They were really cheap so I bought some. ,F: But aren't you leaving China in 2 weeks? How can you finish reading so many books?
(A) M: Yes, I will leave China in one month. But these old clothes are really cheap! (B) M: I am afraid I did not quite catch what you were saying. Please repeat it. (C) M: Exactly! In two weeks, I will back to America, and these old clothes will be brought to America. (D) M: Yeah, I will back to America next year, so I bought some really expensive books!
B