Question

identify the property a + b = b + a associative of addition symmetric identity of addition commutative of addition

Explanation:

Step1: Recall property definitions

The associative property of addition is $(a + b)+c=a+(b + c)$. The symmetric property is if $a = b$ then $b = a$ in an equality - relation context. The identity property of addition is $a+0=a$. The commutative property of addition states that changing the order of addends does not change the sum, i.e., $a + b=b + a$.

Answer:

D. commutative of addition