Simplify the Rational Expression $\frac { x - 5 } { x ^ { 2 } - 25 }$

Multiple Choice

Simplify the rational expression. If the rational expression cannot be simplified, so state.
- $\frac { x - 5 } { x ^ { 2 } - 25 }$

A) $\frac { 1 } { x + 5 }$
B) $x + 5$
C) $\frac { 1 } { x - 5 }$
D) cannot be simplified