Your company has two offices. The relevant portion of the network is configured as shown in the exhibit.

Your ISP has an SMTP server named ISPSMTP that is connected to the Internet.

A separate routing group is configured for each office. A routing group connector is configured between the two routing groups.

You have a single SMTP connector that is configured as shown in the following table.

You need to minimize the amount of bandwidth used on the WAN link between the offices when e-mail messages are delivered to the Internet.

What should you do?

A.
Move all servers to the same routing group.

B.
Create an x.400 connector between the two routing groups.

C.
Configure the SMTP virtual server on EX2 to use the ISPSMTP server as a smart host.

D.
Create a SMTP connector that has an address space of “*”, which uses EX3 as the bridgehead server.