Simplify the Rational Expression $\frac { x + 3 } { x ^ { 2 } + 9 }$

Multiple Choice

Simplify the rational expression. If the rational expression cannot be simplified, so state.
- $\frac { x + 3 } { x ^ { 2 } + 9 }$

A) $\frac { 1 } { x - 3 }$
B) $\frac { 1 } { x + 3 }$
C) cannot be simplified
D) $\frac { 1 } { 3 }$