问题：

[多选]

You are a network administrator for Alpine Ski House. The network consists of a single Active Directory domain. The domain name is alpineskihouse.com. The network contains three Windows Server 2003 domain controllers.  You are creating the recovery plan for the company. According to the existing backup plan， domain controllers are backed up by using normal backups each night. The normal backups of the domain controllers include the system state of each domain controller.  
Your recovery plan must incorporate the following organizational requirements：  
• Active Directory objects that are accidentally or maliciously deleted must be recoverable.
• Active Directory must be restored to its most recent state as quickly as possible.
• Active Directory database replication must be minimized.  
You need to create a plan to restore a deleted organizational unit （OU）.  
Which two actions should you include in your plan？（）

A .  Restart a domain controller in Directory Services Restore Mode.
B .  Restart a domain controller in Safe Mode.
C .  Use the Ntdsutil utility to perform an authoritative restore operation of the Active Directory database.
D .  Restore the system state by using the Always replace the file on my computer option.
E .  Use the Ntdsutil utility to perform an authoritative restore operation of the appropriate subtree.