This is my brother , ( )living in New Jersey, works as a soft

This is my brother , ( )living in New Jersey, works as a software engineer.
A、that
B、who
C、whom
D、which
【正确答案】：B
【题目解析】：who 引导定语从句，先行词是my brother，句子含义是这是我哥哥，住在新泽西州，是名软件工程师。