Consider the code:

public class A $\{$

public int compute$($int x$)\{$

if $($x $<0)$

return $0$;

return x $+1$;

$\}$

$\}$

public class B extends A $\{$

@Override

public int compute$($int x$)\{$

return $($x$+1)$;

$\}$

$\}$

Which of the following is true:

a$.$

This code does not violate any of SOLID principles

b$.$

This code violates single responsibility principle

c$.$

This code violates open$-$close principle

d$.$

This code violates Liskov substitution principle

e$.$

This code violates interface segregation principle

f$.$

This code violates dependency inversion principle