请求帮助 3-1-3

oil analysts predict that if the price of oil falls by half, the consumer's purchase price for gasoline made from this oil will also fall by half.

which one of the following ,if true ,would cast the most serious doubt on the prediction made by the oil analysts?

E refining costs ,distribution costs, and taxes, none of which varies singificatntly with oil prices, constitute a large portion of the price of gasoline.

我怎么觉得e是加强阿？

几种成本的价格与oil的价格差别不是很大—— none of which varies singificatntly with oil prices，意思是不是说，他们的价格也下降一半？那gasoline的价格不是也下降一半吗？不就成加强了吗

你句意理解错了，none of which varies significantly with oil prices是说 没有哪个会跟着 oil price 变化很多的，就是说  oil price 变而  refining costs, distribution costs and tax 等价格不变。

真有意思

我开始的理解是 没有哪一个与oil price 有很大差别，也就是说那些成本的价格与与oil price的价格变化方向、变化幅度是相同的， 而看了joe的解释，是说没有哪一个会跟着oil prices 变化很多的

看了半天，怎么还是觉得我的理解也是通顺的阿，请求高人再给讲解

谢谢