Simplify $(\sec x-\csc x) \sin x \cos x=$ A) $\sin x-\cos x$

Multiple Choice

Simplify:
$(\sec x-\csc x) \sin x \cos x=$

A) $\sin x-\cos x$
B) $\cos x-\sin x$
C) $\sin x+\cos x$
D) $\cos x+\sin x$