OG11-101中心词和指代的迷惑

most parts of SL’rain 双重所有格往往会造成歧义，GMAT里看到就杀。

a of b's c这个形式基本上就是双重所有格形式,而这个形式正确的好像在GWD里有一个特例，就是关于share of book market的，不过那个仔细看就不能算是双重所有格。

BTW：这道题目没必要去想这个问题...因为前后都已经不对称了，those指代parts还是rains是有歧义的。

原题 

Unlike the United States, where farmers can usually depend on rain or snow all year long, the rains in most parts of Sri Lanka are concentrated in the monsoon months, June to September, and the skies are generally clear for the rest of the year.

(A) Unlike the United States, where farmers can usually depend on rain or snow all year long, the rains in most parts of Sri Lanka
(B) Unlike the United States farmers who can usually depend on rain or snow all year long, the rains in most parts of Sri Lanka
(C) Unlike those of the United States, where farmers can usually depend on rain or snow all year long, most parts of Sri Lanka’s rains
(D) In comparison with the United States, whose farmers can usually depend on rain or snow all year long, the rains in most parts of Sri Lanka
(E) In the United States, farmers can usually depend on rain or snow all year long, but in most parts of Sri Lanka the rains

E is the best answer

这里的C 怎么不对啊，这里those 指代什么，i think "those" is reference to "rains" --> but even it is "rains of the United States", which is unparallel to "most parts of Sri Lanka's rains" on form.

most parts of SL’rain 中心词是什么，谁在跟谁做比较？--> i think it is "rain"