For Which Interval(s)is the Function $f(x)=x^{5}-$ 16x³ decreasing?
A) $x<$ -4 or 4

Multiple Choice

For which interval(s) is the function $f(x) =x^{5}-$ 16x³ decreasing?

A) $x<$ -4 or 4 $<$$x$
B) -4 $<$$\chi$$<$ 4
C) -4 $<$$x$$<$ 0
D) 0 $<$$x$$<$ 4
E) -4 $<$$x$$<$ 4,
$x \neq 0$