Determine Which of the Following Is Not True for the Graph

Multiple Choice

Determine which of the following is not true for the graph of $f ( x ) = - x ^ { 4 } + 6 x ^ { 2 } - 4$

A) ƒ is continuous on $( - \infty , \infty )$
B) ƒ has a relative minimum at x = 0.
C) ƒ has relative maxima at $x = \pm \sqrt { 3 }$
D) ƒ has points of inflection at x = ±1.
E) ƒ is concave downward on $( - \infty , 1 )$