阅读下面短文，掌握其大意，从每题所给的A、B、C、D四个选项中，选出最佳选项。
You’re in a department store and you see a couple of attractive young women looking at a sweater. You listen to their conversation:
“I can’t believe it—a Lorenzo Bertolla!They are almost impossible to find. Isn’t it beautiful? And it’s a lot cheaper than the one Sara bought in Rome.”
They leave and you go over to see this incredible sweater. It’s nice and the price is right. You’ve never heard of Lorenzo Bertolla, but those girls looked really stylish. They must know. So, you buy it. You never realize that those young women are employees of an advertising agency. They are actually paid to go from store to store, talking loudly about Lorenzo Bertolla clothes.
