class x {

x () {}

private void one () {}

}

public class Y extends x {

Y() {}

private void two () {

one();

}

public static void main (String[] args) {

new Y().two();

}

}

What changes will make this code compile?

a. Adding the public modifier to the declaration of class x

b. Adding the protected modifier to the x() constructor

c. Changing the private modifier on the declaration of the one() method to protected

d. Removing the Y() constructor

e. Removing the private modifier from the two() method