The manager is Stuart Walker, ________ has been with the company

The manager is Stuart Walker, ________ has been with the company since 1970.
A、whom
B、who
C、that
D、which
【正确答案】：B
【题目解析】：本句是以who引导的定语从句，修饰先行词Stuart Walker。原句的意思是“经理是Stuart Walker，他自从1970年以来一直在公司效力”。因此我们选择B. who。