prep1-192 求助!

192.
            (27115-!-item-!-188;#058&002238)

In 1988, the Council on Economic Priorities began publishing Shopping for a Better World, with the simple thesis of consumers having the power to change companies by the simple expedient of refusing to buy.

A. with the simple thesis of consumers having

B. which had the simple thesis of consumers having

C. where the thesis was simple:  consumers having

D. with a thesis that is a simple one:  consumers have

E. whose thesis was simple:  consumers have

请求高人帮我解释一下这个题，我不明白为什么答案选：E ?

谢谢！！！

E啊

A和B的of consumers having这个搭配不舒服啊

C里面冒号后面缺谓语

D太redundant，只要with a simple thesis就可以了，不要那么复杂啊。

说的不对还请大家指正。

我有点疑问，如果是E,"whose"修饰的先行词是哪个呢？world 吗？感觉不太对呀！！

先行词是"Shopping for a Better World"

这是本书或是文章啊。