Task: Dialogue Generation
Input (English): M: Anna just email to say that the managers meeting is put off till next Monday. Will you have everything ready by then, Sabrina? Hey Sabrina, what's wrong? ,F: I'm so worried. I haven't heard from my sister for 2 weeks. ,M: How often do you call each other? ,F: Normally at least once a week. But she's now a volunteer teacher in a mountain village in Africa. I can only write her.
(A) M: So you and your sister always communicate with each other by letters? (B) M: It's lucky that you and your sister can communicate by e-mails. (C) M: I am sorry. You spoke so rapidly that I did not catch the meaning of what you said. Could you repeat that? (D) M: Why do you and your sister communicate by letters when she is in America?
Output (English): A