单项选择题
YouarecreatingaWindowsCommunicationFoundation（WCF）servicethatimplementsthefollowingservicecontract.PublicInterfaceIOrderProcessingSubApproveOrder（ByValidAsInteger）Forinteractiveandself-pacedpreparationofexam70-513，tryourpracticeexams.Practiceexamsalsoincludeselfassessmentandreportingfeatures!EndInterfaceYouneedtoensurethatonlyuserswiththeManagerrolecancalltheApproveOrdermethod.Whatshouldyoudo？（）A.Inthemethodbody，checktheRights.PosessesPropertypropertytoseeifitcontainsmanager.
B.AddaPrincipalPermissionattributetothemethodandsettheRolespropertytoManager.
C.AddaSecurityPermissionattributetothemethodandsettheSecurityActiontoDemand.
D.Inthemethodbody，createanewinstanceofWindowsClaimSet.
A.PublicInterfaceIOrderProcessingSubApproveOrder（ByValidAsInteger）Forinteractiveandself-pacedpreparationofexam70-513，tryourpracticeexams.Practiceexamsalsoincludeselfassessmentandreportingfeatures!EndInterfaceYouneedtoensurethatonlyuserswiththeManagerrolecancalltheApproveOrdermethod.Whatshouldyoudo？（）A.Inthemethodbody，checktheRights.PosessesPropertypropertytoseeifitcontainsmanager.
B.AddaPrincipalPermissionattributetothemethodandsettheRolespropertytoManager.
C.AddaSecurityPermissionattributetothemethodandsettheSecurityActiontoDemand.
D.Inthemethodbody，createanewinstanceofWindowsClaimSet.
