Let $f ( x ) = 4 - x ^ { 2 }$

Multiple Choice

Let $f ( x ) = 4 - x ^ { 2 }$ . Then $f ^ { \prime } ( x )$ is

A) -2x
B) $- x ^ { 2 }$
C) 2x
D) $x ^ { 2 }$
E) $4 - 2 x$