You have an Exchange Server 2010 organization.
You need to recommend a client access solution that meets the following requirements:
.Reduces the time required for users to reconnect to user mailboxes if a single Client Access server fails
.Prevents users from being prompted for authentication if a single Client Access server fails
What should you recommend?()
A.Client Access server array and hardware load-balancer
B.database availability group (DAG) and hardware load-balancer
C.failover clustering and database availability group (DAG)
D.Windows Network Load Balancing and failover clustering