Which of the following expressions demonstrates the distributive property?

A. 3 + 4 + 5 = 4 + 3 + 5

B. -2(5 + 7) = -2(7 + 5)

C. 3(-8 + 1) = 3(-8) + 3 (1)

D. 6[(7)(-2)] = [(6)(7)](-2)