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

Multiple Choice

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

A) $x - 2 y + 1$
B) $\frac { 1 } { x + 9 }$
C) cannot be simplified
D) $x - y$