QUESTION 20

QUESTION 20 
Given: 
 
public class PingPong implements Runnable
 {
     synchronized void hit(long n)
 {
         for (int i = 1; i < 3; i++)
             System.out.print(n + "-" + i + " ");
     } 
 
    public static void main(String[] args) {
         new Thread(new PingPong()).start();
         new Thread(new PingPong()).start();
     } 
 
    public void run() {
         hit(Thread.currentThread().getId());
     }
 } 
 
Which two statements are true? (Choose two.) 
 
A. The output could be 8-1 7-2 8-2 7-1 
B. The output could be 7-1 7-2 8-1 6-1 
C. The output could be 8-1 7-1 7-2 8-2 
D. The output could be 8-1 8-2 7-1 7-2 
Solution : CD