In the Cisco Unified Contact Center Enterprise clustering over the WAN deployment model, which
WAN configuration is not supported?

A.
Three WAN links: One private network connection and two visible networks (highly available)
which do not fail over to the private network.

B.
Two WAN links: One private network connection and one visible network that is allowed to fail
over to the private network if the visible network fails.

C.
One WAN link: All traffic is converged on a single MPLS network by using appropriate QoS
markings and settings to ensure latency and bandwidth requirements.

D.
One MAN or SONET link: All traffic is converted on a single SONET ring network that is
designed to automatically reroute if there is a link failure in one direction.