Please choose the only correct observation regarding the piece of code below.

switch $($grade$)\{$

case $\text{'}$A$\text{'}$:

case $\text{'}$B$\text{'}$:

case $\text{'}$C$\text{'}$:

case $\text{'}$D$\text{'}$:

printf$("$Passing$")$;

break;

case $\text{'}$F$\text{'}$:

printf$("$Failing$")$;

break;

default:

printf$("$Illegal grade"$)$;

$\}$

Group of answer choices

There is nothing wrong with this code.

This code is incorrect because characters cannot be used as cases in a switch.

This code is incorrect because some cases are empty.

This code is incorrect because there is no break for the default case