Simplify the Rational Expression $$\frac { 81 - x ^ { 2 } } { x ^ { 2 } - 13 x + 36 }$$

Multiple Choice

Simplify the rational expression. If the rational expression cannot be simplified, so state.
- $$\frac { 81 - x ^ { 2 } } { x ^ { 2 } - 13 x + 36 }$$

A) $- \frac { x + 9 } { x + 4 }$
B) $- \frac { x - 9 } { x - 4 }$
C) $- \frac { x + 9 } { x - 4 }$
D) $\frac { x + 9 } { x - 4 }$