The Difference Between Oxidation and Reduction Is That

The difference between oxidation and reduction is that

A) oxidation involves gain of electrons, while reduction involves loss of electrons.
B) oxidation can happen by itself, while reduction is a coupled reaction.
C) an oxidized compound has more electrons than the reduced form of the same compound.
D) oxidation reduces the number of electrons, while reduction increases the number of electrons.
E) oxidation involves transfer of two electrons, while reduction involves transfer of one electron.