Let $f ( x ) = \sin ( \cos x )$

Multiple Choice

Let $f ( x ) = \sin ( \cos x )$ Then $f ^ { \prime } ( x )$ is

A) $\cos ( \sin x )$
B) $\cos ( \cos x )$
C) $\sin x [ \cos ( \cos x ) ]$
D) $- \sin x [ \cos ( \cos x ) ]$
E) $- \sin x [ \sin ( \cos x ) ]$