Java Puzzle 18

Puzzle18.java

public class Puzzle18 {

	public static void main(String[] args){
		A answer = new B();
		System.out.println("Is the second exam comprehensive?");
		answer.print();
	}

	public static class A extends Object {
		public void print() {
			System.out.println("Yes.");
		}
	}
	
	public static class B extends A {
		public void print() {
			System.out.println("Yes kind of, but that wasn't the goal.");
		}
	}
	
	public static class C extends B {
		public void print() {
			System.out.println("No, but you should understand everything...");
		}
	}
	
	public static class D extends Object {
		public void print() {
			System.out.println("I'm not sure, I haven't made it yet...");
		}
	}
	
}