Which three actions should you recommend?

You are evaluating the deployment of two additional Client Access servers and a hardware load balancer in the London office.
You need to recommend changes to the Client Access namespace design to meet the site resiliency requirements.
Which three actions should you recommend? (Each correct answer presents part of the solution. Choose three.)
A. In the London office, set mail.proseware.com as the external host name for Outlook Anywhere. In the New York office, set mail.proseware.com as the external host name for Outlook Anywhere.
B. In the London office, set lonmail.proseware.com as the internal host name for Outlook Anywhere. In the New York office, set nycmail.proseware.com as the internal host name for Outlook Anywhere.
C. Use DNS round robin for the external host name for Outlook Anywhere.
D. Use DNS round robin for the internal host name for Outlook Anywhere.
E. In the London office, set nycmail.proseware.com as the external host name for Outlook Anywhere. In the New York office, set lonmail.proseware.com as the external host name for Outlook Anywhere.
F. In the London office, set mail.proseware.com as the internal host name for Outlook Anywhere. In the New York office, set mail.proseware.com as the internal host name for Outlook Anywhere.