You have an existing Active Directory site named Site1. You create a new Active Directory site and  name it Site2.   You need to configure Active Directory replication between Site1 and Site2. You install a new domain  controller. You create the site link between Site1 and Site2.  What should you do next（）

• A、Use the Active Directory Sites and Services console to configure a new site link bridge object.
• B、Use the Active Directory Sites and Services console to decrease the site link cost between Site1 and  Site2.
• C、Use the Active Directory Sites and Services console to assign a new IP subnet to Site2. Move the new  domain controller object to Site2.
• D、Use the Active Directory Sites and Services console to configure the new domain controller as a  preferred bridgehead server for Site1.