What should you modify?

Your company has three offices. The offices are located in New York, London and Sydney.
The offices connect to each other by using a WAN link. Each office connects directly to the Internet.The company has an Exchange Server organization. The organization contains six mailbox servers. The
servers are configured as shown in the following table.

Each office is configured to use a different Send connector to send email messages to the Internet.
You need to ensure that the servers route email messages that have Internet recipients through their respective
site only.
What should you modify?

A.
the permissions of each Send connector

B.
the settings of the site links

C.
the cost of each Send connector

D.
the scope of each Send connector