Find the limit$,$ if it exists, $$limh$0$x$+$h$3-$x$3$h

Question $6$ options:

A$)$

B$)$

$3$x$2+3$xh$+$h$2$

C$)$

$0$

D$)$

$1$

E$)$

$3$x$2$

F$)$

Does not exist.$$