You are designing the DNS topology to meet the business and technical requirements. Which DNS structure should you use？（）
- A one primary zone
- B two primary zones
- C one Active Directory-integrated zone that has the replication scope set to all DNS servers in the forest.
- D two Active Directory-integrated zones that have the replication scopes set to all DNS servers in the forest.
- E one Active Directory-integrated zone that has the replication scope set to all domain controllers in the domain.
- F two Active Directory-integrated zones that have the replication scopes set to all domain controllers in the domain.