If $$2x + 3y + 4z = 11, 8x^3 + 27y^3 + 64z^3 = 105$$ and $$xyz = 1$$, then the value $$4x^2 + 9y^2 + 16z^2 - 6xy - 12yz - 8xz$$ is:

A

3

B

4

C

5

D

6