Which One of the Following Statements Is Not Correct

Multiple Choice

Which one of the following statements is not correct?

A) Oxidation refers to a chemical reaction in which a substance loses electrons.
B) Reduction refers to a chemical reaction in which a substance gains electrons.
C) The oxidation number represents the charge an atom would have if all its bonds to other atoms were ionic.
D) An oxidizing agent is a substance that is oxidized in a chemical reaction.
E) Statements A-D are all correct.