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 Marketing department contains 5，000 employees that are members of a group named TKPRODUCTS.You receive an instruction from management to make sure that an informative message is shown when employees add TKPRODUCTS to the recipient list of e-mail messages.What should you do？（）

• A、You should consider having a transport rule created.
• B、You should consider having a Send connector created.
• C、You should consider having a MailTip configured.
• D、You should consider having an expansion server configured.