He turns out to be such an extremely successful actor,（ ） none o

He turns out to be such an extremely successful actor,（ ） none of his former classmates is.
A、whom
B、which
C、who
D、that
【正确答案】：B
【题目解析】：非限定性关系分句，先行词 an extremely successful actor 在此并不表示人，而是表示一种身份，故用which。