Describe the end behavior of the function f(x)=−8x4.
A. As x approaches infinity, f(x) approaches negative infinity.

B. As x approaches negative infinity, f(x) approaches infinity. As x approaches infinity, f(x) approaches negative infinity. As x approaches negative infinity, f(x) approaches negative infinity.

C. As x approaches infinity, f(x) approaches infinity. As x approaches negative infinity, f(x) approaches infinity.

D. As x approaches infinity, f(x) approaches infinity. As x approaches negative infinity, f(x) approaches negative infinity.