Consider the following "create" function of an ADT stack implementation:

STACK$*$ createStack $($void$)$

$\{$

STACK$*$ stack;

stack $=($STACK$*)$ malloc$($ sizeof $($STACK$))$;

if $($stack$)$

$\{$

stack$->$count $=0$;

stack$->$top $=$ NULL;

$\}//$ if

return stack;

$\}$

What happens if an overflow occurs?

Question $11$Select one:

a$.$

The function returns NULL.

b$.$

The program crashes.

c$.$

The function returns a pointer to a non$-$existing node.

d$.$

The program exits.