You have an Exchange Server 2003 organization. You install an Exchange Server 2010 Service Pack 1 （SP1） Edge Transport server on the network. You need to ensure that the Edge Transport server can send and receive e-mail messages from the Internet for the organization. You configure the Exchange Server 2003 servers to send all e-mail for external recipients to the Edge Transport servers. What should you do on the Edge Transport servers？（）
- ACreate and configure a Send connector.Create and configure a Receive connector.Create and configure an Accepted domain.
- BCreate an Edge Subscription file. Create and configure a Send connector.Create and configure a Receive connector.
- CCreate an Edge Subscription file. Create and configure a Send connector.Create and configure an Accepted domain.
- DCreate and configure a Send connector.Create and configure an Accepted domain.install the Exchange Server 2010 schema extensions.