Simplify: (Csc X-Tan X) Sin X Cos X= $\sin x-\cos ^{2} x$

Multiple Choice

Simplify: (csc x-tan x) sin x cos x=

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