A network engineer wants to send multicast traffic between two routers that are separated by an IP cloud. The network engineer has access to the two routers, but does not have administrative control of the devices within the IP cloud. How can this goal be accomplished?
A. Configure a generic routing encapsulation tunnel
B. Configure a crypto-map based site-to-site VPN between the two routers
C. Use IP PIM dense-mode
D. Turn on IP multicast routing
