弱弱的问一道XDF某老师讲义里的题，望高人解答！

alpaca

An electric-power company gained greater profits and provided electricity to consumers at lower rates per unit of electricity by building larger-capacity more efficient plants ans by stimulating greater use of electricity with its area. To continue these financial trends, the company planned to replace an old plant by a plant with triple the capacity of ite largest plant.
The company's plans described above assumed each of the following EXCEPET:
A. Demand for electricity within the company's area of service would increase in the future.
B. Expensed would not rise beyond the level that could be compensated for by efficiency or volume of operation.
C. The planned plant would be sufficient reliable in serviece to contribute a net financial benefit to company as a whole.
D. Safety measures to be instituted for the new plant would be the same as those for the plant it would replace.
E. The tripling of capacity would not result in insuperable tehnological obstacles to efficiency.

答案上选的是E。
可是我觉得E没有错，因为把E取非之后是能起到削弱作用的呀~可是其他答案看起来好像也没错。
想不明白了~望高人指点！

哦对了，还想问一下，选项里出现因果互置就是正确的题型是哪些呀？

先谢谢啦！

yayaxiaoxinxin

这个题目看了,我觉得D也对阿,跟safety有什么关系啊

arsenallyr

D 明显不是假设嘛，取非之后结论仍然可以成立  不一定要一样安全 更安全不行吗

alpaca

啊对哦！谢谢啦~

xueying0131

这题选什么呀？