【正确答案】 C

【答案解析】[听力原文8-10] W: Mmm. This is yummy coffee, Bob. How's yours? M: It's excellent. You know, Teresa, I just read an article about coffee last night. It was in that journal that Professor Clark recommended to us. W: Which one was that? Oh, I think I know. Food Economics Review. Isn't that it? M: That's the one. Anyway, in the article there were all kinds of interesting things about coffee that I'd never known before. W: Yeah? Like what? M: Well, did you know that over 30 million people earn their living from some aspect of coffee farming? W: That's a lot of people. Coffee obviously has a lot of importance economically. M: Absolutely. In fact, it's the second most valuable commodity in the world after oil. W: Wow! Well, if it's that big, it's probably produced and controlled by a few large companies, just like with oil. M: Well, this article said otherwise. It said that most coffee's grown by farmers with only 4 or 5 hectares of land. And coffee's usually all they produce. W: So who produces the most coffee? I mean which country? M: It depends on what type of coffee bean you're talking about. W: Oh, of course. The coffee growing countries turn out coffee beans with different flavors. My favorite's Jamaican. M: Jamaica roughly accounts for 2% of the world's overall produce.