Use a Graphing Utility to Graph the Function and Visually $$f ( x ) = 2 x ^ { 4 } - 4 x ^ { 2 }$$

Use a graphing utility to graph the function and visually determine the intervals over which the function is increasing, decreasing, or constant. $$f ( x ) = 2 x ^ { 4 } - 4 x ^ { 2 }$$

A)
decreasing on $( 0,0 )$
increasing on $( 0 , \infty )$
B)
increasing on $( - \infty , - 1 )$
decreasing on $( - 1,0 )$
increasing on $( 0,1 )$
decreasing on $( 1 , \infty )$
C)
decreasing on $( - \infty , - 1 )$
increasing on $( - 1,1 )$
decreasing on $( 1 , \infty )$
D)
increasing on $( - \infty , 0 )$
decreasing on $( 0 , \infty )$
E)
decreasing on $( - \infty , - 1 )$
increasing on $( - 1,0 )$
decreasing on $( 0,1 )$
increasing on $( 1 , \infty )$