What is the output of the following code? public class Add { public int add(int x, int y) { return x+y; } public double add(double x, double y) { return x; } } public class Tester { public static void main(String[] args) { Add add1 = new Add (); System.out.print(add1.add(2.5, 3)); } } A. 5.5 B. 2.5 6.5 D. None of these