A、Buy a racing bicycle. B、Replace the tires on his bicycle. C、Buying a used bicycle. D、Sell his old bicycle to the shop. C

W: Hi, John!
M: Oh. Hi, Laura. What are you doing here?
W: Uh... I’m usually here on weekends. It’s my dad’s shop. So... you’re looking for a bike?
M: Yeah. Now that the weather’s warming up, I thought I’d get some exercise, instead of taking the bus all the time.
W: Well, you came to the right place. Do you know what you’d like?
M: Well, I don’t want a racer or a touring bike or anything. Mostly I’ll just be using it to get me back and forth from work.
W: How far is that?
M: About four miles.
W: Are there a lot of hills on the way?
M: Some, I guess. But... uh ... maybe I should just tell you up front that I’ve only got a hundred and fifty dollars. Can I get anything decent for that?
W: Well, you’re not going to get anything top-of-the-line —but we do have a few trade-ins in the back that’re in good condition.
M: That sounds good.
W: Follow me and I’ll show you what we’ve got.