Let $f ( x ) = \frac { 1 } { 2 } x ^ { 2 } - 3 x + 4$

Multiple Choice

Let $f ( x ) = \frac { 1 } { 2 } x ^ { 2 } - 3 x + 4$ Then $f ^ { \prime } ( x ) = 0$ if x is

A) -3
B) -1
C) 0
D) 1
E) 3