Simplify the Rational Expression $$\frac { 16 \left( x ^ { 2 } - 3 \right) ^ { 3 } + 64 x \left( x ^ { 2 } - 3 \right) ^ { 4 } } { 256 \left( x ^ { 2 } - 3 \right) ^ { 3 } }$$

Multiple Choice

Simplify the rational expression. Use factoring, and assume all variable expressions represent positive real numbers.
- $$\frac { 16 \left( x ^ { 2 } - 3 \right) ^ { 3 } + 64 x \left( x ^ { 2 } - 3 \right) ^ { 4 } } { 256 \left( x ^ { 2 } - 3 \right) ^ { 3 } }$$

A) $\frac { 1 - 4 x ^ { 3 } + 12 x } { 64 }$
B) $\frac { 1 - 4 x ^ { 3 } - 12 x } { 64 }$
C) $\frac { 1 + 4 x ^ { 3 } - 12 x } { 16 }$
D) $\frac { 1 + 4 x ^ { 3 } + 12 x } { 16 }$