Find All Relative Extrema of the Function $f ( x ) = x ^ { 2 / 3 } - 6$

Multiple Choice

Find all relative extrema of the function $f ( x ) = x ^ { 2 / 3 } - 6$ . Use the Second Derivative Test where applicable.

A) relative minimum: $( 0 , - 6 )$
B) relative minimum: $( 0 , - 5 )$
C) relative maximum: $( 0 , - 6 )$
D) relative minimum: $( 0,2 )$
E) relative maximum: $( 0,5 )$