------ The authors of puter 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
网友回答
A. in which
B. through which
C. 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。