You have an Exchange Server 2007 environment. You have two Mailbox servers, two Client Access servers, two Hub Transport servers, and two Edge Transport servers. You need to provide high availability for the Availability service. What should you do?
A.
Configure clustering on the Mailbox servers
B.
Configure Network Load Balancing on the Hub Transport servers
C.
Configure Network Load Balancing on the Client Access servers
D.
Configure Network Load Balancing on the Edge Transport servers