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: F: Hello, Richard. Nice to meet you. ,M: Hi, Barbara. Haven't seen you for ages! ,F: I've just come back from Canada. I was helping in a research program and I stayed in a town near Toronto for 2 months.
(A) M: Really? You stayed in a town near Toronto for 3 months and you visited your friend in Canada? (B) M: Just a minute! I do not quite follow what you are saying, would you mind repeating that? (C) M: So, you stayed in a town near London for 2 months and you  did a research program in Canada? (D) M: Really? You've just come back from Canada and you did a research program in Canada?

D