What is the output when the following code is run?

char sport $=\text{'}$n$\text{'}$;

char outdoor $=\text{'}$n$\text{'}$;

if$($sport $==\text{'}$n$\text{'})\{$

if$($outdoor $==\text{'}$n$\text{'})\{$

System.out.println$("$No sport."$)$;

$\}$

$\}$

else $\{$

if$($outdoor $==\text{'}$n$\text{'})\{$

System.out.println$("$Indoor sport."$)$;

$\}$

else $\{$

System.out.println$("$Outdoor sport."$)$;

$\}$

$\}$

a$.)$

Outdoor sport.

b$.)$

No sport.

c$.)$

Indoor sport.

d$.)$

No output will be displayed.