You work as the exchange administrator at TestKing.com. The TestKing.com network contains anExchange Server 2010 Organization. You are responsible for managing the Exchange network forTestKing.com. You are in the process of deploying an Edge Transport server named TESTKING-EX01 into the organization. During the course of the day you receive an instruction from management to implement amessages hygiene solution. Management wants you to： * Ensure that TESTKING-EX01 blocks e-mails sent to invalid address in the organization. * Ensure that clients receive e-mail from external recipients that is added to their Sage Senders Lists. What should you do？（）

• A、Your best option would be to create Send connectors.
• B、Your best option would be to configure EdgeSync synchronization.
• C、Your best option would be to enable sender filtering.
• D、Your best option would be to configure real time block lists （RBLs）.