I was told that there were about 50 foreign students Chinese in the school, most were from

I was told that there were about 50 foreign students Chinese in the school, most were from America.
A. study；of whom
B. study；of them
C. studying；of them
D. studying；of whom

A. study；of whomB. study；of themC. studying；of them(答案→)D. studying；of whom解析：考察分词用法和定语从句。现在分词短语Studying Chinese in the school修饰名词students,因为两者之间存在主动关系，所以使用现在分词的形式。第二空是定语从句，whom指代50 foreign students，作为of的宾语。

谢谢了