You have a domain controller that runs Windows Server 2008 R2. The Windows Server Backup   feature is installed on the domain controller.   You need to perform a non-authoritative restore of the domain controller by using an existing backup file. What should you do（）

• A、Restart the domain controller in Directory Services Restore Mode. Use the WBADMIN command to perform a critical volume restore.
• B、Restart the domain controller in Directory Services Restore Mode. Use the Windows Server Backup  snap-in to perform a critical volume restore.
• C、Restart the domain controller in safe mode. Use the Windows Server Backup snap-in to perform a  critical volume restore.
• D、Restart the domain controller in safe mode. Use the WBADMIN command to perform a critical volume  restore.