According to the study unit, the commutative property means

a. the order in which you add the numbers doesn't affect the sum.
b. the way the numbers are grouped does affect the sum.
c. the order in which you add the numbers does affect the sum.
d. the way the numbers are grouped doesn't affect the sum.

A. you can add the numbers anyway you like and it won't affect the sum

"We learned that the commutative property of addition tells us numbers can be added in any order and you will still get the same answer. The formula for this property is a + b = b + a. For example, adding 1 + 2 or 2 + 1 will give us the same answer according to the commutative property of addition"