When a conductor mounted on an insulating stand is charged and left for sometime, the conductor eventually loses all its charges. This is because the?

A. electric charges evaporate from the surface of the conductor
B. charges are connected to the earth
C. charges on the conductor are neutralized by opposite charges from the surrounding air
D. charges ionize the surrounding air

Correct Answer: Option C

C. charges on the conductor are neutralized by opposite charges from the surrounding air