You are creating a Windows Forms application by using the .NET Framework 3.5. The application requires a thread that accepts a single integer parameter.   
You write the following code segment （Line numbers are included for reference only.）
Thread myThread = new Thread（new ParameterizedThreadStart（DoWork）） ； 
myThread.Start（100）；
You need to declare the method signature of the DoWork method.  
Which method signature should you use？（）

A.Call the Invoke method of the delegate.
B.Call the BeginInvoke and EndInvoke methods of the delegate in the calling thread.
C.Call the BeginInvoke method by specifying a callback method to be executed when the delegate is complete.Call the EndInvoke method in the callback method.
D.Call the BeginInvoke method by specifying a callback method to be executed when the delegate is complete.Call the EndInvoke method of the delegate in the calling thread.

A.Call the InitLayout method of the form before adding all the controls.Call the PerformLayout method of the form after adding all the controls.
B.Call the InitLayout method of the form before adding all the controls.Call the ResumeLayout method of the form after adding all the controls.
C.Call the SuspendLayout method of the form before adding all the controls.Call the PerformLayout method of the form after adding all the controls.
D.Call the SuspendLayout method of the form before adding all the controls.Call the ResumeLayout method of the form after adding all the controls.

A.Implement theActivated event
B.Implement the MdiChildActivate event
C.Override the OnParentVisibleChanged method
D.Override the OnParentBindingContextChanged method