Your network contains a domain controller that runs Windows Server 2008 R2.  You need to change the location of the Active Directory log files.  
Which tool should you use（）

Your company has a main office and a branch office.  
The network contains an Active Directory forest. The forest contains three domains.  
The branch office contains one domain controller named DC5. DC5 is configured as a global catalog  server， a DHCP server， and a file server.  You remove the global catalog from DC5.  
You need to reduce the size of the Active Directory database on DC5. The solution must minimize the  impact on all users in the branch office.  
What should you do first（）