You are designing the Active Directory infrastructure to meet the business and technical requirements. You run ADSizer， and find that it provides a solution that contains only one domain controller for Amsterdam.  What should you do？（）

• A、 Place at least two domain controllers in Amsterdam.
• B、 Configure the domain controller as a bridgehead server.
• C、 Configure the domain controller as a global catalog server.
• D、 Distribute the users among sites in ADSizer and recalculate the number of domain controllers.