Assuming Fact$(0)$ is $1$ and Fact$($n$)$ returns n$*$n$-1*$n$-2*...,$ which XXX is the base condition for the factorial function?

int Fact$($int n$)\{$

XXX

return $1$;

else

return n $*$ Fact$($n $-1)$;

$\}$

Question $2$Answer

a$.$

if$($n $>=1)$

b$.$

if$($n $<=1)$

c$.$

if$($n $==1)$

d$.$

if$($n $==0)$