问一道逻辑题

Sales campaigns aimed at the faltering personal computer market have strongly emphasized ease of us,called user-friendliness.This emphasis is oddly premature and irrelevant in the eyes of most potential buyers,who are trying to address the logically prior issue of whether____

B)pesonal computers cost more the more user-friendly they are

E)they have enough sensible uses for a personal computer to justify the expense of buying one

答案是选E,为什么B的思路不对呢,请个位高手指教,谢谢了!

B不是正中Sales campaigns 的下怀吗 他们的focus本来就是user-friendliness      potential buyers又是以user-friendliness来买pesonal computers

题目就是要让我们找出一个有别于题干所述的aspect是Sales campaigns忽略的 是 potential buyers重视的

才会说This emphasis is oddly premature and irrelevant

E非常贴切的提供了这么一个aspect

谢谢~