$\text { Find the derivative of the function } \frac { \sin x } { 2 x + \cos x } \text {. Simplify your answer. }$

Multiple Choice

$\text { Find the derivative of the function } \frac { \sin x } { 2 x + \cos x } \text {. Simplify your answer. }$

A)
$\frac { 2 x \cos x - \cos ^ { 2 } x - 2 \sin x + \sin ^ { 2 } x } { ( 2 x + \cos x ) ^ { 2 } }$
B)
$\frac { \cos x } { ( 2 - \sin x ) ^ { 2 } }$
C) $\frac { \cos x } { 2 - \sin x }$
D) $\frac { 1 + 2 x \cos x - 2 \sin x } { ( 2 x + \cos x ) ^ { 2 } }$
E) $\frac { 2 x \cos x + \cos ^ { 2 } x - 2 \sin x - \sin ^ { 2 } x } { ( 2 x + \cos x ) ^ { 2 } }$