Let $f ( x ) = x ^ { 3 } - x ^ { 2 } - x + 8$

Multiple Choice

Let $f ( x ) = x ^ { 3 } - x ^ { 2 } - x + 8$ Then ƒ has a relative minimum at x =

A) $- \frac { 1 } { 3 }$
B) 1
C) $\frac { 1 } { 3 }$
D) -1
E) 2