求助 脑子转不过来了 一道PREP

xingxc11

题目是：Unlike the wholesale price of  raw wool, the wholesale price of raw cotton has fallen considerably in the last year. Thus, although the retail price of cotton clothing at retail clothing store has not yet fallen, it will invitaly fall.

问 Weaken
答案是 The cost of processing raw cotton for clothes has increased during last year.
我怎么觉得答案是加强啊。转不过这根筋了。。。请大牛们帮忙分析一下吧

AlohaDJ

生棉花去年降价了，虽然棉质衣服目前还没降价，但降价势在必行。

weaken结论：棉质衣服不会降价。

答案：生棉到棉质成衣的加工成本升高了—>棉质衣服不会降价。