There is not very much experimental data ______ a decision between the two possibilities. On which to base B. which is based on C. To base on which D. to be based on

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There is not very much experimental data ______ a decision between the two possibilities. On which to base B. which is based on C. To base on which D. to be based on
There is not very much experimental data ______ a decision between the two possibilities.
On which to base
B. which is based on
C. To base on which
D. to be based on

There is not very much experimental data ______ a decision between the two possibilities. On which to base B. which is based on C. To base on which D. to be based on
选D
首先这是一个定语从句,中心语是data,同时data在从句中做base on的宾语所以可以省掉which,而且data 是“被根据”用被动态.而且用不定式表示“将要”的概念,所以选D