Which of the following demonstrates the Commutative Property of Multiplication?

a. 3(4a − 2) = 12a − 6
b. 3(4a − 2) = (4a − 2) ⋅ 3
3. 12a − 6 = (4a − 2) ⋅ 3
d. (3 ⋅ 4a) − 2 = 3(4a − 2)