Definition: 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.
Input: M: Professor Johnson seems so serious. ,F: But his lectures are quite humorous, aren't they?
(A) M: His lectures are quiet? How possible? I think he is not serious. (B) M: I’m sorry, I don’t understand. Could you say it again? (C) M: Why do you think Professor Johnson's lectures are humorous? (D) M: He is not strict at all, I think.

C