
Step-by-step explanation
The commutative property states that the numbers on which we operate can be moved or swapped from their position without making any difference to the answer. The property holds for Addition and Multiplication,hence
Let's check every option
Step 1
a)

this does not show the commutative property
b)

as we can see the factor were moved, and by the commutative property the result is not afected, so

is the answer.
I hope this helps you