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?

A.
• Create and configure a Send connector.
• Create and configure a Receive connector.
• Create and configure an Accepted domain.
B.
• Create and configure a Send connector.
• Create and configure an Accepted domain.
• Install the Exchange Server 2010 schema extensions.
C.
• Create an Edge Subscription file.
• Create and configure a Send connector.
• Create and configure a Receive connector.
D.
• Create an Edge Subscription file.
• Create and configure a Send connector.
• Create and configure an Accepted domain.
Explanation:
http://technet.microsoft.com/en-us/library/bb124011.aspx