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.
-Suppose that a polynomial function is used to model the data shown in the graph below.
For what intervals is the function increasing?

A) 0 through 10 and 30 through 50
B) 0 through 50
C) 0 through 20 and 30 through 50
D) 0 through 10 and 40 through 50