Determine All Critical Points for the Function $$f ( x ) = ( x - 9 ) ^ { 3 }$$

Multiple Choice

Determine all critical points for the function.
- $$f ( x ) = ( x - 9 ) ^ { 3 }$$

A) $x = 9$
B) $x = 0 , x = 9$ , and $x = 3$
C) $x = 9$ and $x = 3$
D) $x = 0$ and $x = 9$