Choose the correct simplification of (4x - 3)(3x^2 - 4x - 3).

A) 12x^3 + 25x^2 + 9
B) 12x^3 - 25x^2 - 9
C) 12x^3 + 25x^2 - 9
D) 12x^3 - 25x^2 + 9