Your network consists of an Active Directory forest named contoso.com. Contoso.com has an Exchange Server 2010 organization. A subsidiary company has a separate Active Directory forest named fabrikam.com. Fabrikam.com has an Exchange Server 2007 organization. You plan to consolidate both organizations. Your companys consolidation strategy includes the following requirements：.Support costs must be minimized .Mailbox access must be easily shared between users .All e-mail messages must be hosted on Exchange Server 2010 mailbox servers You need to recommend a solution to meet the requirements of the consolidation strategy. What should you recommend？（）

A. Move all recipients from fabrikam.com to contoso.com.
B. Transition all servers in fabrikam.com to Exchange Server 2010.
C. In contoso.com， create a resource mailbox for each recipient in fabrikam.com.
D. Move all computer accounts for the Exchange servers in fabrikam.com to contoso.com. On each server， run Setup.com /M：RecoverServer.