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

Multiple Choice

Simplify the rational expression.
- $$\frac { x ^ { 2 } - 9 } { 3 + x }$$

A) $x + 3$
B) 0
C) $3 - x$
D) $x - 3$