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: No, I don't think so. ,M: Thanks. I am waiting for the train at 9:00 o'clock to Shanghai. Where will you go? ,F: What a coincidence! We are on the same train. ,M: Really? What is your seat number? ,F: No.5 on the second row, and you? ,M: I am on the third row No.10. ,F: Could you please keep an eye on my luggage? I want to go to the washroom. ,M: No problem.
(A) F: How about you go to the washroom after I buy a cup of coffee? (B) F: I didn’t hear you. Please could you tell me again? (C) F: Thank you for caring for the luggage, I'll be back as soon as possible. (D) F: And let's get on the train together since we are on the same row.

C