单选题 Product managers ______ performance is considered exceptional will be awarded an annual bonus.
A. whose
B. who
C. which
D. whom

【正确答案】 A
【答案解析】选项(A)whose是关系代词的所有格形式，指代前面的product managers(产品经理)。选项(B)who、选项(C)which和选项(D)whom也是关系代词，但不表示所有格。