Your network contains an Active Directory forest. The forest contains one domain and three sites.  Each site contains two domain controllers. All domain controllers are DNS servers.    
You create a new Active Directory-integrated zone.    
You need to ensure that the new zone is replicated to the domain controllers in only one of the  sites.  
What should you do first（）

Your network contains an Active Directory domain named contoso.com. The contoso.com DNS  zone is stored in Active Directory. All domain controllers run Windows Server 2008 R2.    
You need to identify if all of the DNS records used for Active Directory replication are correctly  registered.    
What should you do（）