A polynomial expression is shown below.

(mx^3 + 4)(3x^2 - 2x + 4) - (4x^5 + 8x^4)

The expression is simplified to:

2x^5 - 12x^4 + 8x^3 + 12x^2 - 8x + 16

What is the value of m?

-2

0

2

4