Question:Which of the following are characteristics of the System.Threading.Timer class? 

A The method provided by the TimerCallback delegate will always be invoked on the thread which created the timer. 

B The thread which creates the timer must have a message processing loop (i.e. be considered a UI thread) 

C The class contains protection to prevent reentrancy to the method provided by the TimerCallback delegate 

D You can receive notification of an instance being Disposed by calling an overload of the Dispose method. 

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