You will be given a definition of a task first, then some input of the task.
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.

F: Hello, this is Canon Camera Company in Beijing. Good morning. What can I do for you? ,M: Well, I am making this phone call to complain about a digital camera made by your company. ,F: What is the problem with it? ,M: The screen always goes black.
(A) F: So, you made the call this afternoon just to complain that your camera's battery runs out very quickly? (B) F: Okay, this is Canon Camera Company in Shanghai, and I have learned that your camera's button doesn't work properly. (C) F: So, you are sending this e-mail to complain that your camera's screen always goes black? Okay, I see. (D) F: I am sorry. You spoke so rapidly that I did not catch the meaning of what you said. Could you repeat that?
Output:
D