Determine which of the following statements is true for the function g(x) = 4x^5 - 3x^6 + 2x^3 - 1.

A. As x increases, y increases. As x decreases, y decreases.

B. As x increases, y increases. As x decreases, y increases.

C. As x increases, y decreases. As x decreases, y increases

D. As x increases, y decreases. As x decreases, y decreases