Final answer:
The property that justifies each step of the solution is the Commutative Property.
Step-by-step explanation:
The given step-by-step solution involves basic arithmetic operations, so the property that justifies each step is the Commutative Property.
In Step 1, the commutative property is used to rearrange the order of subtraction and addition to get the same result.
In Step 2, the commutative property is used again to rearrange the order of addition to get the same result.
Therefore, the correct answer is A) Commutative Property.