Given the task definition and input, reply with output. 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.

M: How much are the tickets? ,F: They 15 pounds each. But student tickets are half price. ,M: Could I have two student tickets, please?
(A) F: I am sorry. You spoke so rapidly that I did not catch the meaning of what you said. Could you repeat that? (B) F: Two tickets come to 15, as you are not buying a student ticket. (C) F: Yes, that'll be 15 pounds. (D) F: Since the student tickets are 15 pounds each, they come to 30 pounds.
C