Send your questions to Mary Adams, _____ is the director of Publ

Send your questions to Mary Adams, _____ is the director of Public Relations, for a quick reply.
A、who
B、which
C、whom
D、that
【正确答案】：A
【题目解析】：句意：把你的问题寄给玛丽·亚当斯，她是公共关系的主管，以便得到快速的答复。从句中缺少主语，先行词是Mary Adams，指人，故用who。