听力原文：M: Are you going to the fair next Saturday？
W: What fair？
M: The annual fair that Riverdale puts on the first Saturday in June to raise money for the Riverdale Hospital. The fair is being held on the university athletic field just like in previous years. Haven't you noticed the tents that are already set up？ W: Yes, I have. What are they for？
M: They are for the many special events and displays and this year there'll be quite a few new events. I'm going to help serve food for a few hours Saturday afternoon.
W: Do many people volunteer to help out？
M: Oh, yes. I like helping because I really enjoy seeing a lot of my friends at the food tent. Everybody loves to eat.
W: So that's it. I heard some other people talking about going to hear local bands. Everyone says that this year's show is supposed to be more exciting than all the others put together. That's the entertainment tent, right？
M: Right. But that event will be the evening before the fair, on Friday. An auction will take place on Saturday afternoon. You know, people donate all kinds of things. There will also be an art show on Saturday and a games tent just for children.
W: It sounds great. I'm glad you mentioned it.
What's the purpose of the fair？

A. To commemorate a famous athlete.
B. To raise funds for a hospital.
C. To help those who are in need.
D. To collect money for the Riverdale University.