Simplify the Rational Expression $\frac { 2 x + 3 } { 10 x ^ { 2 } + 21 x + 9 }$

Multiple Choice

Simplify the rational expression. If the rational expression cannot be simplified, so state.
- $\frac { 2 x + 3 } { 10 x ^ { 2 } + 21 x + 9 }$

A) $\frac { 2 x } { 5 x + 3 }$
B) $\frac { 1 } { 5 x + 3 }$
C) $\frac { 2 x + 5 } { 5 x + 21 }$
D) cannot be simplified