Consider the following declarations. (Select one or more)

public interface Animal { String makeSound(); String animalType(); }

public static class Dog implements Animal { public String makeSound(Animal a) { } }

Which of the following method must be included in the declaration of the Dog class in order for the class to successfully compile?

(a) public String makeSound() (b) public String animalType() (c) public String animalType(Animal b)