You have an Exchange Server 2010 organization that contains a Mailbox server named MBX1， a Client Access server named CAS1， and a Hub Transport server named Hub1.Some users report that they have performance issues when they use Microsoft Office Outlook.You need to gather the RPC performance data from the servers. What are two possible ways to achieve this goal？（）

• A、From MBX1 and CAS1， run Performance Monitor.
• B、From MBX1 and CAS1， run the message tracking viewer.
• C、From CAS1 and HUB1， run the Mail Flow Troubleshooter.
• D、From MBX1 and CAS1， run the Exchange Troubleshooting Assistant.