Which of the following best illustrates the commutative property of addition?
a. 8 + (7 + 3) = (8 + 7) + 3

b. 8(7 + 3) = 8(7) + 8(3)

c. (8 + 7) + 3 = 3 + (8 + 7)

d. 8 + (7 + 3) = (8 + 7) + (8 + 3) − 8

e. 8 + (7 + 3) = 8 + (7 + 3