Identify the base case in the following code.

public class FindMatch $\{$

public static int findMatch$($char array$[],$ int low, int high, char key$)\{$

if $($high $>=$ low$)\{$

int mid $=$ low $+($high $-$ low$)/2$;

if $($array$[$mid$]==$ key$)\{$

return mid;

$\}$

if $($array$[$mid$]>$ key$)\{$

return findMatch$($array$,$ low, mid, key$)$;

$\}$

else $\{$

return findMatch$($array$,$ mid $+1,$ high, key$)$;

$\}$

$\}$

return $-1$;

$\}$

$\}$

Group of answer choices

if $($high$>=$low$)$

if $($array$[$mid$]==$ key$)$

if $($array$[$mid$]>$ key$)$

int mid $=$ low $+($high $-$ low$)/2$;