---The authors of computer viruses are geniuses.---I agree. They can apply their w

------ The authors of computer viruses are geniuses.
------ I agree. They can apply their wisdom to other net technology human beings can benefit.
A. in which
B. through which
C. on which
D. from which

A. in whichB. through whichC. on which(答案→)D. from which解析：考查定语从句。先行词为other net technology，短语：从什么当中获益benefit from,所以用from which，which 指前面的先行词，故选D。

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