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: Excuse me. Where is the nearest post office? I need to mail a package before my lunch break ends. ,M: If you make a left at the end of the block, it's a large Gray building. But Unfortunately, it's closed today, because it's Memorial Day.
(A) F: Please be more specific. I can't find the right direction. (B) F: All the staff in the post office got sick today so it isn't open today. (C) F: I have to rush to the airport. I don't have time to mail the package. (D) F: I am sorry. You spoke so rapidly that I did not catch the meaning of what you said. Could you repeat that?
D