You work as the enterprise exchange administrator at Xxx .Xxx is using Microsoft Exchange Server 2010 as their messaging solution.A new Xxx usage policy prohibits the employees from using certain words in internal e-mail messaging.What actions must you take to have the policy implemented？（）

• A、You must set up an IP Block list.
• B、You must set up sender filtering.
• C、You must set up managed folders.
• D、You must build a transport rule