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: Excuse me, is this seat taken? ,F: I don't think so. The man finished his lunch and left a few minutes ago.
(A) M: Thank you. By the way, this is a nice library, right? (B) M: I’m sorry, I didn’t catch that. Would you mind speaking more slowly? (C) M: Thank you. The environment of this restaurant is pretty good.By the way, do you know the woman who has just finished her lunch at this seat? (D) M: Thank you. Let's get off the bus now.

B