请教各位OG11（紫）中的一道题

72.The gyrfalcon,an Arctic bird of prey,has survived a close brush with extinction ; its numbers are now five times greater than when then use of DDT was sharply restricted in the early 1970's.答案为(A)

A.extinction ; its numbers are now five times greater than

B.extinction ; its numbers are now five times
                    more than

C.extinction , their numbers now fivefold what they were

D.extinction , now with fivefold the numbers they had

E.extinction , now with numbers five times greater than 

以下是解释

B.The use of
                more instead of greater
            inappropriately implies there are now more numbers,rather than more gyrfalcons.(这里不太明白）

D.comma usage introduces a confusing phrase seeming to modify extinction.

E.comma usage introduces a confusing phrase seeming to modify extinction.(D,E也比较模糊)

谢谢各位帮忙指导。

形容numbers用greater不用more，

numbers greater than

but

birds more than

谢谢geon,我明白了。就是比较number应该用greater而比较物体应该用more.

可是D,E我还不明白.

还是有不明白的地方啊 D，E  谢谢各位

D，E解释的很清楚啊。extinction, with.....这个结构是很容易让人以为with短语修饰extinction的。

或许with短语放到句子开头部分能够避免这种误解。