大全-Ⅱ-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.

答案是b,我选的d

选的时候犹豫了一下，但是还是觉得d更直接一点。

前提：从卖六种增加到卖八种

结论：可有更多盈利（我自己认为的，不确定题目具体是不是这个意思）

dess popular brands of computers often provide less profit to the retailer because prices must be discounted to attract customers直接weaken了结论

请指教，谢谢：）

B的意思是现在卖8种，但前7种就占据了几乎所有的市场份额，所以再增加多少种都不可能greatly增加销售了。

相比之下，D的因果关系就小很多了，至少还能增加一点利润。

前提：从卖六种增加到卖八种

结论：可有更多盈利（我自己认为的，不确定题目具体是不是这个意思）

increase greatly the number of computers -------哪里说到是盈利呢