Can you see a man and his horse _C__ are crossing the bridge?A.who B.which C.that D.all请高手为讲下这是个什么从句?我将感激不尽!

Can you see a man and his horse _C__ are crossing the bridge?
A.who B.which C.that D.all
请高手为讲下这是个什么从句?我将感激不尽!

定语从句 C
你能看见正过河的那个人和他的马吗?
who引导人,which引导物,that既可引导人,又可引导物.
这里有人有物就得用that