How is multicast routing enabled on devices in the Cisco SD-WAN overlay network?

A: The WAN Edge routers originate multicast service routes to the vSmart controller via OMP, which then forwards joins for requested multicast groups based on IGMP v1 or v2 toward the source or PIM-RP as specified m the original PIM join message. B: The vSmart controller originates multicast service routes to the WAN Edge routers via OMP, which then forwards joins for requested multicast groups cased on IGMP v1 or v2 toward the source or PlM- RP as specified m the original PIM join message C: The vSmart controller originates multicast service routes to the WAN Edge routers via OMP, which then forwards joins (or requested multicast groups based on IGMP v2 or v3 toward the source or PIM-RP as specified in the original PIM join message D: The WAN Edge routers originate multicast service routes to the vSmart controller via OMP. which then forwards joins for requested multicast groups based on iGMP v2 or v3 toward the source or PIM-RP as specified in the original PIM join message