Given：

What is the result？（）

A.The Thread.sleep（） method can take t1 as an argument.
B.The Object.notify（） method can take t1 as an argument.
C.The Thread.yield（） method can take t1 as an argument.
D.The Thread.setPriority（） method can take t1 as an argument.
E.The Object.notify（） method arbitrarily chooses which thread to notify.

A.move the line 12 print statement into the foo（） method
B.change line 7 to public synchronized void go（） {
C.change the variable declaration on line 2 to private volatile int x；
D.wrap the code inside the foo（） method with a synchronized（ this ） block

A.private synchronized Object o；
B.void go（） {synchronized（） { /* code here */ }
C.public synchronized void go（） { /* code here */ }
D.private synchronized（this） void go（） { /* code here */ }
E.void go（） {synchronized（Object.class） { /* code here */ }
F.void go（） {Object o = new Object（）；synchronized（o） { /* code here */ }