Simplify the following expression.
$$(2a - b - 3c)(4a^2 + b^2 + 9c^2 + 2ab + 6ac - 3bc)$$

A

$$-8a^3 + b^3 + 27c^3$$

B

$$8a^3 + b^3 + 27c^3$$

C

$$8a^3 - b^3 - 27c^3 - 18abc$$

D

$$8a^3 - b^3 - 27c^3 + 18abc$$