Simplify the Rational Expression $\frac { ( x - 6 ) ^ { 2 } } { x ^ { 2 } - 36 }$

Multiple Choice

Simplify the rational expression. If the rational expression cannot be simplified, so state.
- $\frac { ( x - 6 ) ^ { 2 } } { x ^ { 2 } - 36 }$

A) $\frac { x - 6 } { x + 6 }$
B) $\frac { x + 6 } { x - 6 }$
C) cannot be simplified
D) 1