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: I wonder if there is a service charge for our meal? ,M: I think so. The menu says the service charge is 10%. Question, how much is the service charge if the food costs $50?
(A) F: The service charges $15 if the food costs $50. (B) F: The service charges $5 if the food costs $100. So, it may be charge $2.5 when it costs 50%. (C) F: The service charges $5 if the food costs $50. (D) F: I am afraid I did not quite catch what you were saying. Please repeat it.

C