You need to design a strategy for migrating to the mailboxes from Exchange Server 5.5 to Exchange Server 2003. What should you do？（）

• A、Use the Exchange Migration Wizard to migrate all the mailboxes to the Exchange 2003 Servers
• B、Use the Exchange Mailbox Merge Wizard （Exmerge） to migrate all the mailboxes to use the Exchange 2003 servers
• C、Use the Exchange Server Migration Wizard to migrate all the mailboxes to the Exchange 2003 Servers
• D、Export the contents of each mailbox to a .pst file. Create a new mailbox on the Exchange 2003 servers for each existing mailbox. Import the .pst file contents into each new mailbox