You are developing a multilingual Web site by using Silverlight 4 and Microsoft Visual Studio 2010. The user interface controls are defined in a stack panel. You need to configure the stack panel control to display bidirectional languages. Which property should you set on the stack panel?

A.
FlowDirection to RightToLeft

B.
HorizontalAlignment to Left

C.
HorizontalAlignment to Right

D.
Orientation to Horizontal

E.
UseLayoutRounding to True