Given：

What is the result？（）

A.The output could be 5-1 6-1 6-2 5-2
B.The output could be 6-1 6-2 5-1 5-2
C.The output could be 6-1 5-2 6-2 5-1
D.The output could be 6-1 6-2 5-1 7-1

A.4
B.5
C.8
D.9

A.This code can throw an InterruptedException.
B.This code can throw an IllegalMonitorStateException.
C.This code can throw a TimeoutException after ten minutes.
D.Reversing the order of obj.wait（） and obj.notify（） might cause this method to complete normally.
E.A call to notify（） or notifyAll（） from another thread might cause this method to complete normally.