You have an Exchange Server 2010 organization that contains three Mailbox servers.All Mailbox servers are members of a database availability group （DAG） and have a public folder database.The Active Directory forest contains one site.You create a new site and install new Exchange Server 2010 servers in the site.You need to ensure that public folders are stored on servers in both sites.What should you do？（）

• A、Create a public folder database on a server in the new site. Modify the replication settings for all public folders
• B、Create a public folder database on a server in the new site.Run the Set-DatabaseAvailabilityGroup cmdlet from a server in the new site
• C、Configure clustered continuous replication （CCR） on two servers in the new site. Modify the replication settings for all public folder databases
• D、Configure standby continuous replication （SCR） on a server in the new site. Run the Enable-StorageGroupCopy cmdlet from a server in the new site