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.

F: Hi John, how is your summer vacation? ,M: Well, I went to Sanya and spent a whole week there. It can't be better. What about you? ,F: My family went to climb Mount Hua and everyone was worn out upon reaching the top.
(A) M: I didn't hear you. Please could you tell me again? (B) M: Wow, that's great! You know, I went to Sanya and spent two weeks there and I think my vacation is too tiring. (C) M: Really? No one was worn out upon reaching the top? That's great, and I also have a wonderful vacation. (D) M: OK, I see. It is a good vacation. And I think my vacation is also very wonderful.
D