Indicate which property is illustrated in Step 3.
Step 1 2 + (7 + 1) + 0 = 2 + (1 + 7) + 0
Step 2 = (2 + 1) + (7 + 0)
Step 3 = (2 + 1) + 7
Step 4 = 3 + 7
A.
commutative property of multiplication
B.
associative property of addition
C.
identity property of addition
D.
inverse property of addition