You have an Exchange Server 2010 organization that contains five Mailbox servers.Your Active Directory domain contains five domain controllers in a single site. You create a new mailbox database.You notice that the database fails to mount. You need to ensure that the database mounts as soon as possible. What should you do？（）

• A、Configure all domain controllers as Global Catalog servers.
• B、Install the Exchange Server 2010 Administration Tools on a domain controller.
• C、Force the replication of the Active Directory Domain partition between all domain controllers.
• D、Force the replication of the Active Directory Configuration partition between all domain controllers.