He is the last person____I want to see in the world. A,who B,whom C,that D,which

He is the last person____I want to see in the world. A,who B,whom C,that D,which
He is the last person____I want to see in the world.
A,who B,whom C,that D,which
选什么为什么?能说的详细一些吗?谢谢了
我晕说法不一我都不知道谁是对的。。。。。。。He is the last person____I want to see。没有in the world