You need to ensure that all email messages sent and received by a specific Office 365 user are accessible to the Audit department for 60 days, even if the user permanently deletes the messages. What should you do?

A. Run the Set-MailboxDatabase Windows PowerShell cmdlet and specify the – EventHistoryRetentionPeriod parameter.
B. Run the Set-MailboxDatabase Windows PowerShell cmdlet and specify the – DeletedItemRetention parameter.
C. Run the Set-Mailbox Windows PowerShell cmdlet and specify the – SingleItemRecoveryEnabled parameter.
D. Run the Set-Mailbox Windows PowerShell cmdlet and specify the – LitigationHoldEnabled parameter.