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.

M: Yes, we can have as many as we want. But most people decide to have only one or two. And some people decide not to have any. ,F: Why do they decide not to have any? In the old days, we Chinese always wanted to have as many as possible. Some still do now. ,M: Some people prefer to devote all their energy to their work or to seek their own interests and travel. And others see so many problems in the world that they refused to bring children into such a difficult environment. ,F: It's understandable.
(A) M: I'm sorry, I didn't catch that. Would you mind speaking more slowly? (B) M: I know that you can understand all of these! (C) M: Joey, why do you find it hard to believe? (D) M: Why do you say the price control policy is unreasonable?
Output:
B