问题：

[多选]

public class Transfers { 
public static void main（String[] args） throws Exception { 
Record r1 = new Record（）； 
Record r2 = new Record（）； 
doTransfer（r1， r2， 5）； 
doTransfer（r2， r1， 2）； 
doTransfer（r1， r2， 1）； 
// print the result 
System.out.println（”rl = “ + r1.get（） +“， r2=” + r2.get（））； 
} 
private static void doTransfer（ 
final Record a， final Record b， final int amount） { 
Thread t = new Thread（） { 
public void run（） { 
new Clerk（）.transfer（a， b， amount）； 
} 
}； 
t.start（）； 
} 
} 
class Clerk { 
public synchronized void transfer（Record a， Record b， int amount）{ 
synchronized （a） { 
synchronized （b） { 
a.add（-amount）； 
b.add（amount）； 
} 
} 
} 
} 
class Record { 
int num=10； 
public int get（） { return num； } 
public void add（int n） { num = num + n； } 
} 
If Transfers.main（） is run， which three are true？（）

A .  The output may be “r1 = 6， r2 = 14”.
B .  The output may be “r1 = 5， r2 = 15”.
C .  The output may be “r1 = 8， r2 = 12”.
D .  The code may run （and complete） with no output.
E .  The code may deadlock （without completing） with no output.
F .  M IllegalStateException or InterruptedException may be thrown at runtime.