12. Approximately two hundred brands of personal computers are being manufactured, but we currently limit our inventory to only the eight most popular brands. We plan to increase greatly the number of computers we sell by expanding our inventory to include the ten best-selling brands.

Which of the following, if true, points out a major weakness of the plan above?

(A) The capabilities of three most popular personal computers add to be approximately equivalent, with no brand having consistent superiority in all respects.

(B) The seven most popular brands of personal computers account for almost all computers sold.

(C) As the users of personal computers become more sophisticated, they are more willing to buy less well-known brands of computers.

(D) Less popular brands of computers often provide less profit to the retailer because prices must be discounted to attract customers.（B）

(E) The leading brand of personal computer has been losing sales to less popular brands that offer similar capabilities for less money.

措施是要引进best-selling brands, b中是说most popular brands,不是同一范畴怎么能weaken呢？

这道题的逻辑错误很明显

就是我们要通过扩充库存到包括十种最畅销品牌来增加销售，可是问题是我们的八种最受大众欢迎的品牌里面只有七种在卖，还有一种根本就卖不出去，那末原文的方法不是很可笑吗，我认为most popular和best-selling根本就是一回事，我们该如何界定most popular，当然是通过销售情况了，没有可能most popular 的东西根本就卖不出去

The seven most popular brands of personal computers account for almost all computers sold.

E选项是说个人电脑的领先品牌正在丢市场，因为不畅销品牌提供相同品质产品但是价格便宜，由于和数量无关，领先品牌到底有几个，所以并不能够一定削弱

the popular bands 和the best-selling bands 是一样的吗，从什地方可以推出来呢？

这里涉及好几个概念，不知哪几个是一回事。

The argument does not equate "most popular" to "best selling". Otherwise the argument does not hold. The reasoning of the answer is that the company has 7 brands of computers that account for almost all the sales of computers. Adding other brands would not necessarily "increase the number of computer we sell".