[C8] You need to recommend changes to the Exchange Server organization to ensure that callers can leave voice mails if a server fails. Whichcomponent should you recommend?
A. Two Edge servers that have Exchange Server 2010 deployed
B. An additional UM IP gateway
C. An additional Client Access server that has Exchange Server 2010 deployed
D. An additional Unified Messaging server that has Exchange Server 2010 deployed
