OG 12-SC-4题，关于某些选项的异想天开

jojogo

题如下：Of all the vast tides of migration that have sweptthrough history, maybe none is more concentrated as
the wave that brought 12 million immigrants onto
American shores in little more than three decades.


(A) maybe none is more concentrated as
(B) it may be that none is more concentrated as
(C) perhaps it is none that is more concentrated than
(D) maybe it is none that was more concentrated
     than
(E) perhaps none was more concentrated than



答案还是选对了的，就是关于OG解释的D选项，“it” must refer to something, yet it does not plausibly refer to anything.说it在这里没指代的东西。。
可不可以这样看呢？把it is none that was more concentrated than强调句型啊，强调none，意思和maybe none was more concentrated than 意思相同，但是多了一层none的强调含义。。所以改变了该句以前的意思，所以错了。。。在这里it也无需指代。。