A、Extreme stress. B、Hair loss. C、Declining health. D、Mental trouble. B显然，整个对话都是关于男士的脱发问题展开讨论，所以B项为最佳选项。

W: Ron, what are you doing?
M: Ah, nothing. I’m just looking up some information on the Internet.
W: Like what? Let me see.
M: No, no, it’s okay. I mean, you know.
W: Baldness? What are you looking that up for? Well, you know I , I mean, you’re not that bad off.
M: Ah, there you go. Bringing it up again!
W: No. I mean it. You look great] Honestly, it’s not that bad.
M: Hey, I get enough of it from friends, and the people at work, and now from you!
W: Well, maybe you could wear a wig? I think you’d look great.
M: Oh no. And have it slip off my head on to my date’s dinner plate as I lean over to kiss her?
W: Well, have you ever thought about seeking medical advice? There are new advances in medicines that not only prevent hair loss, but help stimulate new growth.
M: Ah, I still don’t give much confidence to medical treatment to prevent permanent hair loss.
W: Well, what about accepting the fact that you’re just losing your hair?
M: I just can’t give up hope. I know appearances shouldn’t matter, but I don’t know. I just feel that women just avoid me.
W: Come on. You can’t be serious.
M: No, really. I’ve seen it many times. It just, I don’t know.