Consider the following class declarations.

public class Dog {

public Dog() {
System. out. println("woof");
}

public void speak() {
System. out. println("Bark");
}
}

public class Pomeranian extends Dog {

public Pomeranian() {
super();
}

public void speak() {
System. out. println("Yip");
}

public void speak(String emotion) {
System. out. println(emotion);
}
}
Pomeranian shows an example of.

a. Overriding and overloading'
b. Neither overriding or overloading
c. Overriding only
d. Overloading only