Which XAML code fragment should you use?

You are creating a Windows Presentation Foundation application by using Microsoft .NET Framework 3.5.
You add a window that displays three-dimensional graphics.
You need to create a camera that meets the following requirements:
* It displays a graphic by excluding the Z-dimension.
* It focuses directly on the front portion of the graphic.
Which XAML code fragment should you use?

A.
<OrthographicCamera Position="0,0,2" LookDirection="0,2,-1" />

B.
<OrthographicCamera Position="0,0,2" LookDirection="0,0,-1" />

C.
<PerspectiveCamera Position="0,0,2" LookDirection="0,2,-1" FieldOfView="60" />

D.
<PerspectiveCamera Position="0,0,2" LookDirection="0,0,-1" FieldOfView="60" />