Which two statements are true regarding the creation of OS Layers with Citrix App Layering? (Choose two.)

Which two statements are true regarding the creation of OS Layers with Citrix App Layering? (Choose two.)
A . When there is a need to update the OS of a layered image, it is ideal to create a new OS Layer.
B . Virtual machines built as the OS Layer should be joined to a functional Active Directory domain within the infrastructure that will be utilized.
C . The Windows Updates feature should be left enabled within the OS Layer in case any new updates occur once the OS Layer is deployed.
D . Any Microsoft products that are updated by the Windows Updates feature should be included in the OS Layer.
E . For best performance, complete a clean installation of the Windows operating system when building an OS Layer.

Answer: D,E