Question

Indicate which property is illustrated in Step 1.

Step 1 6 + (2 + 9) + 0 = 6 + (9 + 2) + 0
Step 2 = (6 + 9) + (2 + 0)
Step 3 = (6 + 9) + 2
Step 4 = 15 + 2
A. associative property of multiplication
B. commutative property of multiplication
C. associative property of addition
D. commutative property of addition