Answer:
C. the order in which you add the numbers doesn't affect the sum.
Explanation:
The Commutative Property for sum states that the order in which we add the numbers doesn't affect the sum of numbers. i.e.
(a + b) + c = a + (b + c)
Example, (5 + 4) + 2 = 9 + 2 = 11
5 + (4 + 2) = 5 + 6 = 11
Hence, Option C is only correct answer.