一道英语单选题帮忙看下为什么选C

问题描述:

一道英语单选题帮忙看下为什么选C
Golf will be one of thee tow events __to the Olympic Games in 2016.A.who return B.what returns C.that return D.which returns

定语从句,只有that which 可以引导.但events是复数,所以选C.