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: Why are you looking so upset? What's the problem? ,F: I have to write a long article and I just can't come up with any ideas. And I have to hand it in tomorrow.
(A) M: I’m sorry, I don’t understand. Could you say it again? (B) M: Why are you still happy on condition that you can't decide which country to visit? (C) M: So you are upset because you don't know how to do your homework. (D) M: Why are you still happy on condition that you don't know how to do your homework?

C