YournetworkcontainsanExchangeServer2010server.AllusersaccesstheirmailboxesbyusingonlyMicrosoftOfficeOutlook2007.Youconfigureapolicytoarchivealle-mailmessageslocatedintheEntireMailbox365daysaftertheyarereceived.YouneedtoensurethatallmembersofadepartmentnamedSalescanretainsomee-mailmessagesforfiveyears.Whatshouldyoucreatefirst？（）
A.alinkedmailbox
B.amanagedcustomfolder
C.amessageclassification
D.anOutlookProtectionRule
参考答案：B
