A、  B、  C、  B询问负责人的who疑问句→回答人名

Which reference do you recommend?
(A)  I think this one is the best.
(B)  I’ll buy them.
(C)  Oh, I didn’ t recognize that memo.

Who is in charge of sending those pamphlets?
(A) I got an e-mail this morning.
(B) Mr. Lee deals with them.
(C) No, I haven’t seen them.