Question:The framework provides three different timer classes. Select the answer that properly matches the class with the listed characteristic. 

A System.Threading.Timer Simple timer which requires a delegate to be supplied for execution when the timer expires. execution of the method provided by the delegate will be invoked on a ThreadPool Thread. 

B System.Timers.Timer: Designed for use with worker threads in a multithreaded environment. Can move among threads to handle the raised Elapsed event May result in more accuracy than System.Windows.Forms.Timer instances. 

C System.Windows.Forms.Timer Lower Resolution timer which requires a UI message pump on the creating thread. 

D All of these 

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