You need to recommend changes to the existing Active Directory infrastructure to support the planned Exchange Server 2010 SP1 deployment. The solution must meet the business goals of Fabrikam.

What should you include in the recommendation? (Choose all that apply.)

A.
Raise the functional level of the forest.

B.
Raise the functional level of the domain.

C.
Upgrade all of the domain controllers to Windows Server 2008 R2.

D.
Upgrade all of the global catalog servers to Windows Server 2008 R2.

E.
Upgrade one global catalog server in each site to Windows Server 2008 R2.