Which of the Following Statements About Valence Electrons Are False

Which of the following statements about valence electrons are false? Select all that apply.

A) When heterolytic cleavage occurs, a pair of valence electrons is distributed unequally between two atoms.
B) We use a curly arrow to denote the movement of a pair of valence electrons.
C) The movement of valence electrons during a chemical reaction is random.
D) During a chemical reaction, valence electrons can move both within and between molecules.
E) The movement of valence electrons during a chemical reaction is described by the reaction scheme.