What is the value stored in the $n$ variable after executing the following Java program fragment?

int n $=10$;

char code $=\text{'}$ b$\text{'}$;

switch $($code$)\{$

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

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

n $+=1$;

break;

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

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

n $-=2$;

break;

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

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

n $+=2$;

break;

default:

n $=13$;

$\}$

Select one:

$11$

compilation error

runtime error

$12$

$8$

$13$

none of the above