M: Hi, Mary, you are in Boston, too. I remember you are admitted to Washington University. And are you meeting someone at the airport? ,F: Glad to meet you here, Bob. I am meeting my parents. You are paying a visit to your grandparents?
(A) M: Yes. Have your parents' flight arrived? I can give you a lift later. (B) M: I see that your parents' flight has been delayed, darling. Let's wait. (C) M: Correct. Anyway, it's very surprising to see you at the train station. (D) M: I didn’t hear you. Please could you tell me again?
A