Read the following conversation and answer the question. W: Hello, this is Dell China. What can I do for you? M: I want to order a laptop computer for my wife. W: Certainly. What type would you like to buy for her? M: AM520. W: What color does she want, a black one or a white one? M: She prefers a black one. W: All right. Have you decided what size to buy? There are different sizes to choose from, from 13-inch ones to 17-inch ones. M: Well, I want to buy a 15-inch one. How much does it cost? W: 5000 yuan, including the postage. Question: What color does the man want? - Red. - White. - Black.
The answer to this question is:
Black.