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.

M: Hey, is your sister coming to dinner tonight? ,F: No, she isn't. She has to work late on Fridays
(A) M: I didn't hear you. Please could you tell me again? (B) M: Well, if your sister isn't coming, then we it's just two of us for tomorrow's lunch. (C) M: Alright, if your sister isn't coming, I think we can invite Mr. Jason to have dinner with us. (D) M: What a pity that your sister's in another town now, the party last night should have been a surprise for her!
C