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: Hey, May, how are you getting to Xi'an next week? ,F: I'm not sure yet. I may take the train, but then again, I may take the bus. ,M: But the bus takes a long time. You could fly. It's not so expensive these days.
(A) F: You have a point. I'm going to check out if it's cheaper to get there by plane. (B) F: It's so nice of you to go there by bus with me together. (C) F: Thank you, I like travelling by train as well. (D) F: I’m sorry, I don’t understand. Could you say it again?

A