Use a Double Angle Formula to Rewrite the Following Expression $$- 16 \sin ( x ) \cos ( x )$$

Use a double angle formula to rewrite the following expression.
$$- 16 \sin ( x ) \cos ( x )$$

A) $\sin ( - 16 x )$
B) $2 \sin ( - 8 x )$
C) $- 8 \cos ( 2 x )$
D) $- 8 \sin ( 2 x )$
E) $\cos ( - 16 x )$