单项选择题 You are designing the DNS infrastructure to meet the business and technical requirements.  What should you do？（）

单项选择题 You are designing an Active Directory implementation strategy to present to executives from your company and from Contoso， Ltd.  Which implementation strategy should you use？（）

单项选择题 You are designing a forest and domain structure to address the concerns of Contoso， Ltd.， and to meet the business and technical requirements. You want to use the minimum number of domains and forests that are required.  Which domain structure should you use？（）