狒狒逻辑107，我不懂，求解

IESE

107. Because of the recent transformation of the market, Quore, Inc., must increase the next two years, or it will certainly go bankrupt. In fact, however, Quore’s production structure is such that if a 10 percent productivity increase is possible, then a 20 percent increase is attainable.
If the statements above are true, which one of the following must on the basis of them also be true?
(A) It is only Quore’s production structure that makes it possible for Quore to survive the transformation of the market.
(B) Quore will not go bankrupt if it achieves a productivity increase of 20 percent over the next two years.
(C) If the market had not been transformed, Quore would have required no productivity increase in order to avoid bankruptcy.
(D) Because of the transformation of the market, Quore will achieve a productivity increase of 10 percent over the next two years.
(E) If a 20 percent productivity increase is unattainable for Quore, then it must go bankrupt.

我的理解：这个公司要么increase   要么bankrupt   如果increase10%,那20%也不是问题
答案认为如果20%不能实现，那么就一定是bankrupt。但是前提里也没说increase一定是10%啊！
谁来回答我～～～多谢～～～

panbangzhu

这怎么说呢。。。前四个选项看着就不能选。于是肯定是选E了。。。但是E是神马意思呢。
题里最后一句的意思就是如果10%的增长是可能的，20%的增长也是可获得的。
E说的是如果20%的增长是不可获得的，（也就是说10%的增长也是不POSSIBLE的），企业就很可能会倒闭。（我觉得这儿的MUST也是表示可能性的，不是“一定”的意思，跟题里的那个MUST INCREASE 一样。）
大概是这么个逻辑吧。不知道说明白没。。。

IESE

基本明白，多谢～～感觉自己还是对各种逆命题和逆否命题之间的关系不太理解，回头再好好看看～～