多项选择题

Which three will compile and rim without exception?()

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 */ } }

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