You have an Exchange Server 2010 Service Pack 1 （SP1） Mailbox server that contains multiple mailbox databases. You need to ensure that you are notified when deleted mailboxes are purged from the server.What should you do？（）

• A、Attach a new task to the Application event log.
• B、Modify the properties of the mailbox database objects.
• C、Create a new Data Collector Set.
• D、Create a new Event Viewer Subscription.