Which equation illustrates the distributive property of multiplication over addition?

A. 6(3a + 4b) = 18a + 4b
B. 6(3a + 4b) = 18a + 24b
C. 6(3a + 4b) = (3a + 4b)6
D. 6(3a + 4b) = 6(4b + 3a)​