Rewrite with Only Sin X and Cos X $\sin 2 x - \cos x$

Multiple Choice

Rewrite with only sin x and cos x.
- $\sin 2 x - \cos x$

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