Mo can be defined as
A. An Antecedent, condition that alters the effectiveness of a consequence and evokes behavior that produces those consequences
B.An Antecedent, condition that alters the effectiveness of a consequence and abates behavior that produces those consequences
C.An Antecedent, condition that alters the effectiveness of a consequence and either evokes or abates behavior that produces those consequences
D. An abolishing and establishing operation that alters the effectiveness of a stimulus