What is the value of $$(a + b)^{3} - a^{3} + b^{3}$$?

A

$$-3ab(a - b) + 2b^{3}$$

B

$$3ab(a + b) + 2b^{3}$$

C

$$3ab(a - b) b^{3}$$

D

$$-3ab(a + b) + b^{3}$$