—The authors of puter viruses are geniuses.
—I agree. If they applied their wisdom to other net technology human beings can benefit, it would be better.
A. in which
B. through which
C. from which
D. during which
网友回答
A. in which
B. through which
(答案→)C. from which
D. during which
解析：考查介词与关系词引导的定语从句。benefit from通过……获利。因此，选择C项。