请教OG10 199

199. Because the Earth's crust is more solid there and thus better able to transmit shock waves, an earthquake of a given magnitude typically devastates an area 100 times greater in the eastern United States than it does in the West.

(A)              of a given magnitude typically devastates an area 100 times greater in the eastern United States than it does in the West

(B)              of a given magnitude will typically devastate 100 times the area if it occurs in the eastern United States instead of the West

(C)              will typically devastate 100 times the area in the eastern United States than one of comparable magnitude occurring in the West

(D)              in the eastern United States will typically
                devastate an area 100 times greater than will a quake of comparable magnitude occurring in the West

(E)   that occurs in the eastern United States will
                typically devastate 100 times more area than if it occurred with comparable magnitude in the West

我想问一下，In choice C, 100 times the area... than is unidiomatic.是什么意思啊？我记得白勇的语法上面说过倍数结构只有四种用法：twice as much as; twice as many as; twice the + 名词; twice + that从句。如果按照这个标准判断的话，应该只有C选项符合啊，为什么不选呢？谢谢。

我想可能是因为c中的one 从句意上应该指代the earthquake,比较结构前后比较的对象要一致，所以前面的area是不能和 the earthquake作比较的。