$20.$Consider the following method.

$/**$ Precondition: arr.length $>0*/$

public static int mystery$($int$[]$ arr$)$

$\{$ int index $=0$;

int count $=0$;

int m $=-1$;

for $($int outer $=0$; outer $<$ arr.length; outer$++)$

$\{$ count $=0$;

for $($int inner $=$ outer $+1$; inner $<$ arr.length; inner$++)$

$\{$ if $($arr$[$outer$]==$ arr$[$inner$])$

$\{$ count$++$; $\}\}$

if $($count $>$ m$)$

$\{$ index $=$ outer;

m $=$ count;

$\}\}$

return index;

$\}$

Assume that nums has been declared and initialized as an array of integer values. Which of

the following best describes the value returned by the call mystery$($nums$)?$

$($A$)$ The maximum value that occurs in nums

$($B$)$ An index of the maximum value that occurs in nums

$($C$)$ The number of times that the maximum value occurs in nums

$($D$)$ A value that occurs most often in nums

$($E$)$ An index of a value that occurs most often in nums