Definition: 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.
Input: M: Will Mr Black be able to see me at 9:15 tomorrow morning? ,F: Sorry, but he's fully booked till 11:00. ,M: Would 10:00 to 1:00 be convenient? ,F: Well, better come at 3:00 in the afternoon.
(A) M: OK, thank you. I didn't expect you to be Mr. Black's visitor. You mean I'd better go at three o'clock tomorrow afternoon, right? (B) M: Well, thank you, Mr. Black's secretary. You mean I'd better go at three o'clock tomorrow afternoon? (C) M: I didn't realize you were Mr. Black's boss. You mean I'd better go at three o'clock tomorrow afternoon? (D) M: I’m sorry, I don’t understand. Could you say it again?

D