Simplify the Expression $\sin 8 x \cos 8 x$ A) $\cos 8 x$

Multiple Choice

Simplify the expression.
- $\sin 8 x \cos 8 x$

A) $\cos 8 x$
B) $\cos 4 x$
C) $2 \sin 4 x$
D) $\frac { 1 } { 2 } \sin 16 x$