YourcompanyhasanActiveDirectorydirectoryservicedomain.ThedomainfunctionallevelisWindowsServer2003.Thecompanyhasamainofficewithtwodomaincontrollers（DCs）.Userslogontoclientcomputersbyusinguserprincipalnames（UPNs）.Youplantosetupanewbranchofficewithonedomaincontroller.Youneedtoensurethatwhenthebranchofficedomaincontrollersconnectiontothemainofficeisunavailable，usersinthebranchofficecanlogontothedomain.Whatshouldyoudo？（）
A.Addanewdomaincontrollerinthebranchoffice.
B.Configurethebranchofficedomaincontrollerasaglobalcatalogserver.
C.TransfertheRIDMasterroletothebranchofficedomaincontroller.
D.TransfertheInfrastructureMasterroletothebranchofficedomaincontroller.
参考答案：B
