You are designing an application by using Windows Presentation Foundation (WPF) and Microsoft .NET Framework 4.
You plan to create a wizard by using a Window, a Frame, and several Page objects.
The wizard will use the Navigation Service. The Navigation Service will be invoked by buttons on the user interface (UI).
You need to ensure that prior-page navigation can be disabled.
What should you do?
A. In the button On Click event, remove the previous wizard page from the journal.
B. In the button On Click event, remove the previous wizard page from the Window.
C. In the button On Mouse Down event, remove the previous wizard page from the Frame.
D. In the button On Mouse Down event, remove the previous wizard page from the Window.
