You are designing a DNS implementation strategy to meet the business and technical requirements. What should you do？（）

A. Configure a domain controller in each branch office to contain a secondary zone of the contoso.com domain.
B. Configure the DNS Server service on a domain controller in each office. Configure an Active Directory-integrated zone to replicate to all DNS servers.
Configure an Active Directory-integrated zone on a domain controller in Sydney. Configure this zone to replicate to all domain controllers.
D. Configure a primary zone for blueyonderairlines.com on a domain controller in Sydney. Configure a secondary zone on another DNS server in Sydney.