Of all the vast tides of migration that have swept through 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
My answer was (C). Now I understand "it is none" is slightly wordy but what's wrong with the tense? The first part of the sentence has a present perfect tense, and describes all the tides from a distant past till the the present time. So by that logic shouldn't it convey the meaning that until now no wave is more concentrated than the wave ... Then why wouldn't (C) be the correct choice?