[求助]问一道语法题!谢谢PREP的~

A different variety of giant tortoise can be found on every island in the Galapagos, each with its own style of oversized dome and comically scrawny neck.

(A) each with its own style of oversized dome and comically scrawny neck

(B) each with their own styles of oversized domes and comically scrawny necks

(C) each having their own style of oversized dome and comically scrawny neck

(D) all having their own styles of oversized domes and comically scrawny necks

(E) all with their own style of oversized dome and comically scrawny neck

我的问题:有时EACH表示同位语,有时表示的是独立主格,到底有什么不同呢?比如说如果把这里看做同位语,很可能就把正确答案排除了,因为A里面可以看做EACH修饰GALAPAGOS啊~请指点!

同意楼上的观点，句意结合主谓单复数关系可以很快得出正确答案。其实比较选项之间的差别是做SC的一个比较重要的技巧～

那也就是说其实并没有定数,只是关键在于比较是么?

那么有的题目是被当作例外来看么?