You are decommissioning one of the domain controllers in a child domain. You need to transfer  all domain operations master roles within the child domain to a newly installed domain controller  in the same child domain.    
Which three domain operations master roles should you transfer（）

Your company has an Active Directory domain.    
You log on to the domain controller. The Active Directory Schema snap-in is not available in the  Microsoft Management Console （MMC）.  
You need to access the Active Directory Schema snap-in.    
What should you do（）

Your company has an Active Directory forest. Not all domain controllers in the forest are  configured as Global Catalog Servers. Your domain structure contains one root domain and one  child domain.
You modify the folder permissions on a file server that is in the child domain. You discover that  some Access Control entries start with S-1-5-21... and that no account name is listed.
You need to list the account names. 
What should you do（）

Your company has a main office and 10 branch offices. Each branch office has an Active  
Directory site that contains one domain controller. Only domain controllers in the main office are  configured as Global Catalog servers.    
You need to deactivate the Universal Group Membership Caching option on the domain  controllers in the branch offices.  
At which level should you deactivate the Universal Group Membership Caching option（）