The associative property tells us that we can move a set of parentheses around a problem if it is only addition/subtraction (treating subtraction as negatives) or multiplication.
All that has been done in this problem is that the parentheses have been moved around, so this is the associative property.
Simple! Your brain is probably telling you the answer is Associative property because it has addition but think again! It is commutative property because commutative means it repeats the same thing to doom it down for you basically. It repeats the same thing after the equal sign! Therefore, the answer is B. Commutative property.
