You install an Exchange Server 2010 Hub Transport server named Hub1.You need to ensure that Hub1 can receive e-mail messages sent from Internet hosts.What should you do？（）
- AEnable the Anonymous users permission group for the Client Hub1 Receive connector.
- BEnable the Anonymous users permission group for the Default Hub1 Receive connector.
- CCreate a Receive connector and set the intended use to Client.Modify the port for the connector.
- DCreate a Receive connector and set the intended use to Custom.Modify the remote IP addresses range for the connector.