参考答案：C

解析：

[听力原文]1-4 W: What are you laughing about？

M: I just saw the serious advertisement on TV for Germen soups. It’s said our products are home-made with the freshest vegetables and fruits. Then a scene in the factory showed that products were prepared and packed by the most sophisticated machinery.

W: And I am sure that the word NATURE was put on the jars and cans of the products. I think the stupidest advertisements are those that imply that you are one of a kind. If you buy the product, you will be a very special person. Now you will be just like every other one of the 20 billion people who bought it.

M: That’s really silly. But to me, the dullest of them all is when advertisers put a celebrity on TV to talk about a particular brand of soap or about a particular car. I bet that the celebrity’s never used the product before they got the job of appearing in the commercial.

W: Yeah! But most of these commercials work and people remember the product.

M: I agree, here we are talking about ads we’ve seen, aren’t we We are all influenced by those celebrities and brand names.

W: I think teenagers are specially vulnerable. Advertisers try to get teenagers used to a brand because they know that in later years, the teenagers will stick to that particular product of theirs.