关于GWD-8-Q24的理解

GWD-8-Q24:

A March 2000 Census Bureau survey showed that Mexico accounted for more than a quarter of all foreign-born residents of the United States, the largest share for any country to contribute since 1890, when about 30 percent of the country’s foreign-born population was from Germany.

A.    the largest share for any country to contribute

B.    the largest share that any country has contributed

C.    which makes it the largest share for any country to contribute

D.    having the largest share to be contributed by any country

E.     having the largest share to have been contributed by any country

答案是B，可是不理解这句话的含义。请指教！谢谢！

大概翻下吧

2000年三月调查表明超过四分之一的美国的外国出生居民来自墨西哥,这个比重是自1890年来外国出生居民占美国的最大的比重,1890年大概有30%的美国的国外出生的人口来自德国...

现在理解了吧...

翻译错，意思应该是自1890以来，单个国家贡献的美国国外出生居民的最大比例。这个比例中，分母是国外出生居民，不是整个美国