Shelia simplified an expression using the following steps. which property justifies step 3? Step 1: 5x + 4(3+2x)
Step2: 5x + 12 + 8x
Step3: 5x + 8x + 12
Step4: 13x+12

A. Identity property
B. Associative property
C. Distributive property
D. Commutative property

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