11. class Payload {  12. private int weight；  13. public Payload（int wt） { weight = wt； }  13. public void setWeight（mt w） { weight = w； }  15. public String toString { return Integer.toString（weight）； }  16. }  17.  18. public class TestPayload {  19. static void changePayload（Payload p） { 20. /* insert code here */ 21. }  22.  23. public static void main（String[] args） {  24. Payload p = new Payload（）；  25. p.setWeight（1024）；  26. changePayload（p）；  27. System.out.println（”The value of p is “+ p）；  28. }  29. }  Which statement， placed at line 20， causes the code to print “The value of p is 420.”？（） 

• A、 p.setWeight（420）；
• B、 p.changePayload（420）；
• C、 p = new Payload（420）；
• D、 Payload.setWeight（420）；
• E、 p = Payload.setWeight（420）；
• F、 p = new Payload（）； p.setWeight（420）；