You work as the enterprise exchange administrator at Xxx .The Xxx network consists of a domain named xxx .Xxx is using Microsoft Exchange Server 2010 as their messaging solution. What actions must you take to stop a user named Mia Hamm from removing information from her mailbox？（）
- AYou must use log transactions.
- BYou must use a legal hold.
- CYou must use Outlook Protection Rules.
- DYou must use the Set-Mailbox Mia Hamm -LitigationHoldEnabled $true.