You need to back up all of the group policies in a domain.    
The solution must minimize the size of the backup.    
What should you use（）

Your network contains an Active Directory domain.    
You need to restore a deleted computer account from the Active Directory Recycle Bin.    
What should you do（）

Your network contains an Active Directory domain. The domain contains two domain controllers  named DC1 and DC2.  
You perform a full backup of the domain controllers every night by using Windows Server  Backup.  
You update a script in the SYSVOL folder.    
You discover that the new script fails to run properly. You need to restore the previous version of  the script in the SYSVOL folder. The solution must minimize the amount of time required to  restore the script.    
What should you do first（）

Your network contains an Active Directory domain. The domain contains two Active Directory  sites named Site1 and Site2. Site1 contains two domain controllers named DC1 and DC2. Site2  contains two domain controller named DC3 and DC4.  
The functional level of the domain is Windows Server 2008 R2. The functional level of the forest  is Windows Server 2003.    
Active Directory replication between Site1 and Site2 occurs from 20：00 to 01：00 every day. At  07：00， an administrator deletes a user account while he is logged on to DC1. You need to restore  the deleted user account. You want to achieve this goal by using the minimum amount of  administrative effort.    
What should you do（）