Determine the Maximum Possible Number of Turning Points for the Graph

Multiple Choice

Determine the maximum possible number of turning points for the graph of the function.
- $$f ( x ) = ( 2 x + 3 ) ^ { 2 } \left( x ^ { 2 } - 1 \right) ( x + 1 )$$

A) 10
B) 4
C) 5
D) 2