A、Professors are responsible for the cleaning work. B、Professors are responsible for reminding students to behave well. C、It is

W: I need to go across town, but the traffic is so heavy this time of the day.
M: When you take the subway, you don’t have to deal with traffic. I never drive any more.
What does the man imply?

M: Like usual the lecture hall is complete mess this afternoon. Newspapers, soda cans, used issues, all of it, just thrown all over the floor. I can’t understand how people can be so thoughtless.
W: Well, your professor should have the authority to get something done about it.
What does the woman imply the man should do?