How many $x$-intercepts appear on the graph of this polynomial function?
$f(x)=x^4-5x^2$
A$3$ $x$-intercepts
B$1$ $x$-intercept
C$2$ $x$-intercepts
D$4$ $x$-intercepts
$f(x)=x^4-5x^2$
A$3$ $x$-intercepts
B$1$ $x$-intercept
C$2$ $x$-intercepts
D$4$ $x$-intercepts