M: Mary, how are you going to Xiamen for the summer vacation? ,F: I'm going by train.
(A) M: You're going to Xiamen by bus. It would be a long trip. (B) M: I’m sorry, I didn’t catch that. Would you mind speaking more slowly? (C) M: Of course, train is the best option to go to Xiamen. (D) M: Have you bought the ticket since you decide to fly to Xiamen?
C