The Integral $\int \sin ^ { 2 } x d x$

Multiple Choice

The integral $\int \sin ^ { 2 } x d x$ is

A) $\frac { x + 2 \sin ( 2 x ) } { 4 } + C$
B) $\frac { x - 2 \sin ( 2 x ) } { 4 } + C$
C) $- \frac { 2 x - \sin ( 2 x ) } { 4 } + C$
D) $\frac { 2 x + \sin ( 2 x ) } { 4 } + C$
E) $\frac { 2 x - \sin ( 2 x ) } { 4 } + C$