M: Last night's heavy snow storm has made all main roads in the area. Too dangerous to use, the airport is closed until tomorrow morning and all ferries are cancelled, too. ,F: Yes, but the trains are still working normally.
(A) M: The snow yesterday was not big at all, so people can still travel by air today. (B) M: Yeah, people can travel by train today. (C) M: Since it didn't snow yesterday, people can travel by ship today. (D) M: I am afraid I did not quite catch what you were saying. Please repeat it.
B