This is one of the means ____t he electic energy is conducted from one place to another.

1. A.
   by which
2. B.
   by that
3. C.
   through which
4. D.
   through that

This is one of the means ____t he electic energy is conducted from one place to another.

A. by which                B. by that           C. through which      D. through that