Find All the Critical Numbers of the Function $f ( x ) = x ^ { 3 } - 3 x - 2$

Multiple Choice

Find all the critical numbers of the function $f ( x ) = x ^ { 3 } - 3 x - 2$ .

A) None
B) -1, 1
C) 0, -1, 1
D) $- \sqrt [ 3 ] { 2 }$