M: I hear we can book train tickets on the Internet now. ,F: Really? We won't have to deal with the headaches at the ticket office now.
(A) M: I totally agree. Buying tickets will be more convenient with this new service. (B) M: I know, right? Headache is such a stubborn disease. (C) M: I agree. Buying plane tickets on the internet has become a tradition. (D) M: Just a minute! I do not quite follow what you are saying, would you mind repeating that?
A