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: F: Excuse me, my watch stopped running and I am not sure what's wrong with it. ,M: Well, let me look at it. It seems that it just needs a new battery. ,F: Oh, really? I got some water on it last week and I was afraid that it might ruin the watch. How much is a new battery? ,M: It's $5 and we not only change a battery, but also guarantee it for a year and if you have the watch cleaned here, we can guarantee it for an additional 3 months.
(A) F: I am really sorry, I did not catch that. Would you slow down, please? (B) F: Since you offer a one-year guarantee for the battery, I'll change one for my phone. (C) F: Haha, it sounds good that you offer a one-year guarantee for the new battery. (D) F: Wow, you provide an additional free cleaning service if I change the battery?

C