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.

M: Hi, Jennie. How do you like the university? ,F: Hello, Bob. I like it very much. ,M: Have you started your classes yet? ,F: I have been to two lectures, chemistry and history.
(A) M: Ah! You've taken four classes, but why haven't you taken history? (B) M: So you've taken history and physics? (C) M: Why don't you like university after only three classes? (D) M: I am really sorry, I did not catch that. Would you slow down, please?
D