You work as the enterprise exchange administrator at Company.com.The Company.com network consists of a single Active Directory domain named Company.com.Company.com has an Exchange Server 2010 organization.During a routine monitoring， you notice that e-mail messages going to the Internet encompasses internal Exchange routing information in the message header.The Company.com CIO does not want that information to be sent to their clients. What should you do？（）

• A、The best option is to set up a new remote domain.
• B、The best option is to change the permissions of the Send connector.
• C、The best option is to change the properties of the sender reputation feature.
• D、The best option is to enable domain security on the default Receive connector.