You need to design a migration strategy to migrate public folders from the existing Exchange Server 5.5 environment to the Exchange Server 2003 environment. What should you do？（）

• A、Install and configure the Exchange utility. Use the utility to migrate and import all calendar information into each new mailbox
• B、Install and configure the InterOrg Replication Utility. Use the utility to migrate public folder information from Exchange Server 5.5 to Exchange Server 2003
• C、Install and configure a public folder connection agreement. Use this agreement to migrate the public folder information from Exchange Server 5.5 to Exchange Server 2003
• D、Run the pfmigrate command to migrate the public folder information from Exchange Server 5.5 to Exchange Server 2003