You are the network administrator for The network consists of a single Active Directory domain named All network servers run Windows Server 2003, and all client computers run Windows XP Professional. You use the Backup utility to schedule a full backup of TESTKINGDC1 every night. You ensure that the Active Directory configuration is also backed up. One week later, TESTKINGDC1 stops accepting logon requests. On investigation, you discover that the Active Directory configuration is corrupt. You need to restore TESTKINGDC1 as a functioning domain controller. Which two actions should you perform? （）(Each correct answer presents part of the solution. Choose two)

• A、Restart TESTKINGDC1 in Directory Services Restore Mode.
• B、Demote TESTKINGDC1 to a member server.
• C、Run the ntbackup systemstate command on TESTKINGDC1.
• D、Run the Backup utility and select the option to restore the System State data.
• E、Run the ntdsutil command on TESTKINGDC1.