多选题

Which three will compile and run without exception?()

Aprivate synchronized Object o;

Bvoid go() {synchronized() {  }

Cpublic synchronized void go() {  }

Dprivate synchronized(this) void go() {  }

Evoid go() {synchronized(Object.class) {  }

Fvoid go() {Object o = new Object();synchronized(o) {  }

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