Let $f ( x ) = - 3 ( x + 5 ) ^ { 2 }$

Multiple Choice

Let $f ( x ) = - 3 ( x + 5 ) ^ { 2 }$ . Then $f ^ { \prime } ( x )$ is

A) $- 6 x$
B) $- 6 x - 15$
C) $- 6 x - 30$
D) $- 6 x + 15$
E) $- 6 x + 30$