Master MCQ

What is printed? ``java public class Box { private int v; public Box(int v) { this.v = v; } public void add(int n) { v += n; } public String toString() { return "" + v; } } Box one = new Box(10); Box two = one; two.add(5); one = new Box(1); one.add(1); System.out.print(one + "/" + two); ` A. 2/15 B. 15/2 C. 2/2 D. 15/15` Print the letter, then your one-sentence justification.