What is the output of the following program? class A { String s = "Class A"; } class B extends A { String s = "Class B"; { System.out.print(super.s); } } class C extends B { String s = "Class C"; { System.out.print(super.s); } } public class MainClass { public static void main(String[] args) { C c = new C(); System.out.print(c.s); } }