Task: Dialogue Generation
Input (English): F: Mark, did you one study abroad? ,M: Yes, I went to Australia as an exchange student about 8 years ago. I was only 16 years old then. I studied there for 2 years. ,F: What was the biggest surprise about your study abroad experience? ,M: Well, before I went to Australia, I was afraid I wouldn't make any friends there. But it turned out it was quite easy for me to make friends there, and there was another big surprise for me too! ,F: What was it? ,M: I didn't expect to have so many great experiences in the country. But in Australia, I often traveled with my new friends. I was even able to travel up and down the East Coast with some great new friends.
(A) F: So you are surprised mostly because you could travel around alone in Japan. (B) F: So you are surprised mostly because you were popular with girls  in Japan. (C) F: So you are surprised mostly because you could make friends easily in Japan. (D) F: I’m sorry, I didn’t catch that. Would you mind speaking more slowly?
Output (English): D