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: The post office should be open today. They only close on Sundays. ,F: Oh, then. It's good that I didn't wait until tomorrow to send this letter.
(A) M: Oh, tomorrow is Sunday. (B) M: But, today is Saturday. (C) M: I’m sorry, I don’t understand. Could you say it again? (D) M: Today is Monday. They should open now.

B