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.
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