OG43 - pls help to clarify

43.    In the minds of many people living in England, before Australia was Australia, it was the antipodes, the opposite pole to civilization, an obscure and unimaginable place that was considered the end of the world.

(A) before Australia was Australia, it was the antipodes

(B) before there was Australia, it was the antipodes

(C) it was the antipodes that was Australia

(D) Australia was what was the antipodes

(E) Australia was what had been known as the antipodes

I have a question about the structure of the sentence. Since "the opposite pole to civilization" and "an obscure and unimaginable place that was considered the end of the world" are both appositives, what do they modify???

       As I know, an appositive can only modify the noun which closes it. but the two appositive seem to both modifiy the first "Australia." Is it correct in GMAT grammar? For example:

S+V+O, appositiveA, appositiveB. If "O" is a noun, can appositive A and B both modify the "S"? Or do I have any misunderstanding of the meaning of this question? Pls help me to clarify!!!! Tks!!!!!!

有一定道理。但是感觉an...place不象作为独立主格。应该是主语的同位语，因为主语的it就是指那个Australia那个地方。

不应该是anipode的同位语，因为逻辑意思不一致。

不过，the opposite pole肯定是修饰antipode。

一家之言。

不加and,用逗号不能表示并列吗？请指点。

the opposite pole使插入语，解释说明antipodes; an...place that...是it（以前的澳大利亚）的同位语。