Which actions should you perform in sequence?

You are designing a Windows Phone 7 application that supports portrait or landscape orientations. You need to display a video in the application that responds to changes in device orientation. Which actions should you perform in sequence? (To answer, move the appropriate steps from the list of actions to the answer area and arrange them in the correct order.)

A.
Add a MediaElement control to the page.

B.
Add a PlaneProjection transform and set the RotationX property to 90.

C.
Add a RotateTransform transform and set the Angle property to 90.

D.
Set the source of MediaElement to the appropriate video file.

E.
Set the source of MediaElement to the appropriate audio file.