What are reasons A and B in the proof? Prove: 12 · [j · (2 · k) · 3] = 72jk Statements Reasons 12 · [j · (2 · k) · 3] = 12 · [j · 2 · (k · 3)] Associative Property of Multiplication = 12 · [j · 2 · (3 · k)] Commutative Property of Multiplication = 12 · [j · (2 · 3) · k)] A. = 12 · (j · 6 · k) Multiplication = 12 · (6 ·j · k) Commutative Property of Multiplication = 12 · (6 · jk) Multiplication = (12 · 6) · jk B. = 72 · jk Multiplication = 72jk Multiplication Commutative Property of Multiplication Multiplication Associative Property of Multiplication Distributive Property