Determine the Maximum Number of Turning Points of F $$f ( x ) = ( x - 2 ) ^ { 2 } ( x + 4 ) ^ { 2 }$$

Determine the maximum number of turning points of f.
- $$f ( x ) = ( x - 2 ) ^ { 2 } ( x + 4 ) ^ { 2 }$$

A) 3
B) 2
C) 4
D) 1