Could I speak to is in charge of International Sales please?

Could I speak to         is in charge of International Sales please?

A.who

B.what

C.whoever

D.whateve

答案及解析： C

解析：

考查名词性从句。此处缺少speak to的宾语从句的主语，whoever泛指“无论谁”。我可以和负责国际销售的人通话吗？选C