Which of the following is an example of the commutative property?

a (a + b) + c = (b + a) + c
b (a + b) + c = a + (b + c)
c a(b + c) = ab + ac

Commutative property refers to moving stuff around 
For example:

The rule for addition is "a + b = b + a"
Substitute in numbers it would be (this is just an example)

2+3=3+2

It basically just moved the numbers around.

For multiplication it would be:

"ab = ba"
Substitute in numbers would be:

"2×3 = 3×2"

So... I think i'd probably Say A

What can we do about it