Your network consists of a single Active Directory forest. The forest contains one Active Directory domain. The domain contains eight domain controllers. The domain controllers run Windows Server 2003 Service Pack 2. You upgrade one of the domain controllers to Windows Server 2008 R2. You need to recommend an Active Directory recovery strategy that supports the recovery of deletedobjects. The solution must allow deleted objects to be recovered for up to one year after the date of deletion. What should you recommend？（）

A. Increase the tombstone lifetime for the forest.
B. Increase the interval of the garbage collection process for the forest.
Configure daily backups of the Windows Server 2008 R2 domain controller.
D. Enable shadow copies of the drive that contains the Ntds.dit file on the Windows Server 2008 R2 domain controller.