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: Good afternoon, I'm Robert Anderson. I have an appointment with Mrs. Brown. Is she in? ,F: Yes, she is. She is waiting for you in her office. Please, come in.
(A) M: Thank you for accepting my visit. (B) M: Thank you. I'll make a phone call again later. (C) M: I didn't hear you. Please could you tell me again? (D) M: Thank you. I'm glad to hear that I've just made the appointment successively.
Output:
A