Which enumeration member should you use?

You use Microsoft .NET Framework 4 to create a Windows Presentation Foundation (WPF) application.
The application uses the drag-and-drop functionality.
You need to ensure that the drag-and-drop operation is stopped when a user moves the cursor outside the boundaries of the application form.
Which enumeration member should you use?

You use Microsoft .NET Framework 4 to create a Windows Presentation Foundation (WPF) application.
The application uses the drag-and-drop functionality.
You need to ensure that the drag-and-drop operation is stopped when a user moves the cursor outside the boundaries of the application form.
Which enumeration member should you use?

A.
DragAction.Cancel

B.
DragAction.Drop

C.
DragDropEffects.None

D.
DragDropEffects.All



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