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: I'd like this letter to go by EMS. What's the rate? ,F: $7.65 for up to 2 pounds. ,M: Thank you. I hear the EMS is the next day service. Is that true? ,F: Well, it's true within America, but now you are in Beijing. The letter has to go through customs and get registered there. Anyway, it's faster and safer than ordinary mail. ,M: Then how long will it take to get to New York? ,F: It depends. Usually 3 to 5 days. ,M: I see. How much does that come to? ,F: That'll be $15.30.
(A) M: I don' mind EMS is slower than others since $7.65 is a good price. (B) M: $15.30 is acceptable since it will arrive New York the next day. (C) M: I am really sorry, I did not catch that. Would you slow down, please? (D) M: I can't believe I have to pay $50.30 only for a letter to Beijing.

C