Which two changes， tak

Which two changes， taken together， would guarantee the output： 1， 2， 3， 4， 5？（）

• Amove the line 12 print statement into the foo（） method
• Bchange line 7 to public synchronized void go（）{
• Cchange the variable declaration on line 2 to private volatile int x；
• Dwrap the code inside the foo（） method with a synchronized（this） block
• Ewrap the for loop code inside the go（） method with a synchronized block synchronized（this）{//for loop code here}