A、Selling bike. B、Selling books. C、Ad in Campus Daily. D、Campus Daily. C通篇全文可知, 两人正在讨论在校刊上登广告的事, 故选C。

W: David. have you ever placed an ad in the Campus Daily?
M: Yes. I once did that to sell my bike I no longer needed.  
W: When was that?
M: Last May. I think. Why do you ask?
W: I’m thinking of selling my old book since I am going to graduate.  
M: Are they in good condition?
W: Pretty good.  
M: Well. you can call Berne Li. He is the head of the advertising department of the paper.  
W: Do you know what rates they charge?
M: Last May it was 10 yuan for the first 30 words and 50 fen for each word added.  
W: 10 yuan for the first 30 words. That is not too bad.  
M: Yeah. it’s reasonable.  
W: Do they charge extra for pictures?
M: No. that’s free. But they do charge you more if you Want to put in a bow or something.  
W: I see. Thanks. That’s very helpful.  
M: It’s a pleasure.
Questions:
What are the speakers talking about?
What rates do they charge?
Who can the woman call if she wants to place an ad in the Campus Daily?