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: Mary, how are you going to Xiamen for the summer vacation? ,F: I'm going by train.
(A) M: You're going to Xiamen by bus. It would be a long trip. (B) M: I’m sorry, I didn’t catch that. Would you mind speaking more slowly? (C) M: Of course, train is the best option to go to Xiamen. (D) M: Have you bought the ticket since you decide to fly to Xiamen?

C