Given the following function:

public static int tF$($int m$,$ int n$)\{$

if $($m $==0)$

return n $+1$;

else if $($m $>0)$

return tF$($m$-1,$ n$)$;

else if $(($m $>0)$ && $($n $>0))$

return tF$($m$-1,$n$-1)$;

else

return $0$;

$\}$

What is returned by tF$(1,3)?$

Group of answer choices

$3$

$0$

$4$

Unable to determine