几道题目实在是百思不得其解，sb helps me plz!

我有几题新东方的语法实在是想不太通,还忘朋友们帮助解围:

1.The expected rise in the price of oil could be a serious impact to industrialized
nations and severely diminish the possibility to have an economy free of
inflation.
(A) be a serious impact to industrialized nations and severely diminish the
possibility to have 
(B) seriously impact on industrialized nations and severely impede the possibility
to have
(C) seriously impact on industrialized nations and severely impede the possibility
of having
(D) have a serious impact on industrialized nations and severely impede the
possibility to have
(E) have a serious impact on industrialized nations and severely diminish the
possibility of having

2.According to the Better Business Bureau, if you fail to advertise the highest pric
in a range of prices for a service or product as prominently as that of the lowest,
        
violates the New York Consumer Protection Law.
(A) if you fail to advertise the highest price in a range of prices for a service or
product as prominently as that of the lowest, it
(B) if one fails to advertise the highest price in a range of prices for a service or
product as prominently as the lowest price, it 

(C) failure to advertise the highest price in a range of prices for a service or
product as prominently as the lowest
(D) failure to advertise as prominently the highest price in a range of prices for a
service or product as the lowest
(E) failing to advertise as prominently the highest price in a range of prices for a
service or products as that of the lowest  

3.A recent study of ancient clay deposits has provided new evidence supporting the
theory of global forest fires ignited by a meteorite impact that contributed to the
extinction of the dinosaurs and many other creatures some 65 million years ago.
(A) supporting the theory of global forest fires ignited by a meteorite impact that
(B) supporting the theory that global forest fires ignited by a meteorite impact
(C) that supports the theory of global forest fires that were ignited by a meteorite
impact and that
(D) in support of the theory that global forest fires were ignited by a meteorite
impact and that
(E) of support for the theory of a meteorite impact that ignited global forest fires
and

1.E, 但是根据平行结构，为什么c不行呢？

2. C, what about the E?

2.A, A attributes to B, according to OG, A should be the effect, then B should be the cause, but here, the rule seems to be reversed in alternative A, How come?

感谢帮助！

1.书上解释是IMPEDE 和DIMINISH意思不同,不能互换,我相信了...

2. do sth as** as sth  .STH和STH要对应.E 里面的THAT指代的是什么呢?

3.contribute....和ATTRIBUTE不是一个词啊..

3x

第二，三题知道问题了，但是第一题实在是不能怎么信服，还望指导

词换了意思变了 所以错了

diminish意思是减少 impede 是阻碍  有所不同吧

原句是DIMINISH

而且或许IMPEDE THE POSSIBILITY 是错误的搭配

恩,恩,现在才发现B.E的区别,真的是忒马虎了,impede and diminsh,

impede因该跟stg好像比较说的通点，impede the possibility..的确听的有点怪！

谢了!