A network engineer is having wireless multicast fail when it hits the wired network. What command will show the source of multicast groups for troubleshooting?

The `show ip igmp` command displays Internet Group Management Protocol (IGMP) information related to hosts joining multicast groups, but it does not show the multicast routing path or source information within the routing table itself.

The `show ip mroute` command displays the multicast routing table, providing critical information about active multicast groups, their sources (S), and the outgoing interfaces (O) on which traffic is forwarded. This command allows an engineer to verify if the multicast source is recognized and if the correct paths are established for multicast forwarding on the wired network.

The `show ip mcache` command displays the multicast cache, which typically shows specific forwarding entries, but `show ip mroute` provides a more comprehensive view of the multicast routing table, including sources and outgoing interfaces.

The `show ip interface counts` command displays packet statistics for interfaces and does not provide any information about multicast groups, sources, or routing paths.

The `show ip route` command displays the unicast routing table and does not provide information about multicast group sources or multicast-specific routing paths.