Consider the following method that will alter the matrix mat:

$/**$ Qparam mat the initialized matrix

Oparam row the row number

$*\frac{*}{?}$

public static void matStuff $($int $[][]$ mat, int row$)$

$\{$

int numCols $=$ mat $[0].$ length;

for $($int col$=0$; col $$ numCols; col$++)$

mat $[$row$][$col$]=$ row;

$\}$

Suppose mat is originally

$\backslash$table$[[1,4,9,0],[2,7,8,6],[5,1,4,3]]$

After the method call matStuff $($mat$,2),$ matrix mat will be

$($A$)1,4,9,0$

$2,7,8,6$

$2,2,2,2$

$($B$)$

$\backslash$table$[[1,4,9,0],[2,2,2,2],[5,1,4,3]]$

$($C$)$

$\backslash$table$[[2,2,2,2],[2,2,2,2],[2,2,2,2]]$

$($D$)$

$\backslash$table$[[1,4,2,0],[2,7,2,6],[5,1,2,3]]$

$($E$)$

$\backslash$table$[[1,2,9,0],[2,2,8,6],[5,2,4,3]]$