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: I can't believe you're leaving tomorrow, all the way to Tokyo. Be sure to send us a postcard and write us a letter or 2. ,M: Look, I'm going to be busy. We've got Japanese culture classes in the morning and then field trips in the afternoon. You know it's a really busy program and I will go out with my new friends in the evening. Hey, what are you doing?
(A) F: I see. The business trip to China must be very interesting. Hope you enjoy. (B) F: How I wish I could travel with you to Italy. But I got lots of works to do. (C) F: Enjoy the program in China. You have plenty of time to walk around. (D) F: I'm sorry, I didn't understand. Could you repeat a little louder, please?
D