I can't find Mr.Smith.Where did you meet him this morning?

I can't find Mr.Smith.Where did you meet him this morning?
It was in the hotel _____[A.that B.which]he stayed.
选A的理由:It was...that是一句强调句,原句为:He stayed in the hotel.
选B的理由:which引导定语从句修饰hotel
究竟应该选择哪一个?为什么?
B选项抄错了，应该是where ,就是可以引导定语从句的那个词.
原题中有三个选项,而which在原题中是B选项,被我排除了,所以抄到电脑上B选项应该是where