What prevents the man from taking the poets of 1960s course?

W:Hi, Mark, how is it going?
M:Well, not so great. I’ve got a big problem with the poetry course that’s required for my major.
W:Is that all filled up?
M:No, no, there’s plenty of room, but there is a prerequisite. I’ve got to take an introduction to poetry before I can take the special course in poets of the 1960s and the introductory course is only offered inthe evenings.
W:You don’t like evening classes?
M:No, that’s not the point. I work in the cafeteria every evening. I need the money to pay my tuition.
W:Can you ask someone to switch hours with you?
M:I wish I could. My boss just did me a favor by putting me on evenings. And he’ll hit the ceiling if I ask to change again.
W:Wait a minute. I have an idea. Have you checked the courses over at the community college? They might offer an introductory poetry course during the day.
M:Hey, that’s a great idea! I’m free this afternoon. I think I’ll go over and check it out.
W:Yeah, their courses are actually cheaper, and you can transfer the credits over there.
M:Thanks for the advice, Linda. I’ll let you know what happens.