Which statement best describes electrons?

A. Electrons have a positive charge.

B. Electrons reside in the nucleus.

C. Electrons orbit around the nucleus.

D. Electrons are composed of protons and neutrons.

First off, electrons are negatively charged, they are definitely not inside the nucleus. And, seriously, they are not made up of protons and neutrons. Thus, the only one left is C. Electrons orbit around the nucleus.

Thus, C, is your answer.