You need some facts _______to base your theory.A.where B.on which C.in place where D.in the place

题目

You need some facts _______to base your theory.A.where B.on which C.in place where D.in the place
.You need some facts _______to base your theory.A.where B.on which C.in place where D.in the place选B（这是个定从吗,先行词是facts?which作啥成分?on搭配的短语是啥,那其他选项错哪儿了,

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