You work as the Exchange administrator at Company.com.The Company.com network contains an Exchange Server 2010 Organization.Company.com has its headquarters in Stockholm where you are located.The Company.com network contains a hub transport serer named -ex02.-ex02 is used to receive all incoming email messages from the internet.you decide to install anti-spam agents on -ex02.during the day you receive an instruction from management to make sure that only e-mail messages sent to the e-mail addresses in the active directory is accepted by -ex02. What should you do？（）

A. This can be accomplished by having the properties of the default Receive Connector modified.
B. This can be accomplished by having the properties of the Sender Filtering agent modified.
C. This can be accomplished by having the properties of the Recipient Filtering agent modified.
D. This can be accomplished by having the properties of the default Accepted Domain modified.