Consider the graph of the function f$($x$)=$ x$^3-5$x$^2+6$x $/$ x$^2-5$x$+6$

Which is a removable discontinuity for the graph? Select from below.

$1.$ x$=-3$

$2.$ x$=-2$

$3.$ x$=0$

$4.$ x$=2$

$5.$ x$=3$