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: Good afternoon, I'm Roseanne, your flight attendant. Welcome aboard. ,M: Hello. I've got seat A8. I hope it's by a window, so that I can see the view.
(A) F: Your seat is B5 in this train. (B) F: Hello. I am the bus driver. (C) F: Your seat is A9 on the plane. (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