Simplify the Rational Expression $$\frac { 3 x ^ { 2 } + 9 x ^ { 3 } } { 2 x + 6 x ^ { 2 } }$$

Multiple Choice

Simplify the rational expression. If the rational expression cannot be simplified, so state.
- $$\frac { 3 x ^ { 2 } + 9 x ^ { 3 } } { 2 x + 6 x ^ { 2 } }$$

A) $\frac { 3 x } { 2 }$
B) cannot be simplified
C) $\frac { 3 } { 2 }$
D) $\frac { 3 + 9 x ^ { 3 } } { 2 x + 6 }$