The famous basketballer, _______ tried to make a comeback, attracted a lot of attention

A.where

B.when

C.which

D.who

答案及解析： D

解析：

D。先行词是 The famous basketballer(著名的篮球明星)，故要用 who 来引导定语从句，因为其余三项均不用于指人。