Use a Double-Angle Formula to Rewrite the Expression $6 \sin ^ { 2 } x - 3$

Multiple Choice

Use a double-angle formula to rewrite the expression.
$6 \sin ^ { 2 } x - 3$

A) $- 3 \cos 2 x$
B) $3 \cos 2 x$
C) $- 6 \cos x$
D) $3 \cos x$
E) $6 \cos 2 x$