You have a single Active Directory directory service domain. You back up your domain controllers on a nightly basis. You perform Group Policy backups on a nightly basis. A Group Policy object （GPO） is accidentally deleted. You need to restore the GPO.  What should you do？（）

• A、 Perform a nonauthoritative restore of the Active Directory database.
• B、 Perform an authoritative restore of the Active Directory database.
• C、 Select the Import Policy option in the Group Policy Object Editor.
• D、 Restore the GPO by using the Group Policy Management Console.