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: Excuse me, have you got any books on engineering? I have looked for them everywhere. But I can't find any. ,F: I'm not sure if we've got any now. Books that kind are on the shelf. Well, I'm afraid we've sold out.
(A) M: OK. I will come to borrow those books next time. (B) M: Excuse me, could you repeat the question? (C) M: OK. I will come to buy medical books next time. (D) M: OK. I will come to buy those books next time.

D