题目选项分析

Research has shown that shoppers who purchase garments in a "luxury" material, such as cashmere or angora, are likely to purchase garments in more than one other luxury materials, as well. A recent livestock disease has significantly reduced the amount of cashmere available on the market. This, in turn, has driven up the prices of the cashmere products still available for purchase. We can therefore conclude that more people will be buying angora items of clothing this year than they did in previous years.

Which of the following, if true, best supports the claim that more people will be buying angora clothing this year?

【选项】The number of customers purchasing angora has increased every year for the past decade in steady increments.