YournetworkconsistsofasingleActiveDirectorydomain.YouhaveadomaincontrollerandamemberserverthatrunWindowsServer2008R2.BothserversareconfiguredasDNSservers.ClientcomputersruneitherWindowsXPServicePack3orWindows7.Youhaveastandardprimaryzoneonthedomaincontroller.Thememberserverhostsasecondarycopyofthezone.Youneedtoensurethatonlyauthenticatedusersareallowedtoupdatehost（A）recordsintheDNSzone.Whatshouldyoudofirst（）
A.Onthememberserver，addaconditionalforwarder.
B.Onthememberserver，installActiveDirectoryDomainServices.
C.AddallcomputeraccountstotheDNSUpdateProxygroup.
D.ConvertthestandardprimaryzonetoanActiveDirectory-integratedzone.
正确答案：参考D
