You will be given a definition of a task first, then some input of the task.
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.

F: Excuse me, Sir. But could you not smoke here? I'm pregnant. ,M: Of course, I'm sorry, ma'am. I actually hate it too, but I can't quit. ,F: I know it's not easy, but many of my friends have succeeded in quitting. ,M: Really? How did they do it? ,F: They quit for their family, they decided to give up smoking after they got married. ,M: So, are you married? ,F: No, I'm only 22 years old. ,M: Then you must have started smoking at an early age. ,F: Yes, I started 5 years ago, I was copying my father. Now I know that was a mistake. But it's too late.
(A) M: Really? You were copying your father and when you started smoking, you were 17 years old? (B) M: So, you started 7 years ago and when you started smoking, you were just 15 years old? (C) M: I'm sorry, I don't understand. Could you say it again? (D) M: So, you don't know that was a mistake now and when you started smoking, you were 19 years old?
Output:
A