How do you get to the multicast subcommand mode where you can enter the igmp commands for further multicast support?

How do you get to the multicast subcommand mode where you can enter the igmp commands for
further multicast support?

A.
Enter the multicast mode command in configuration mode.

B.
Use the clear IGMP group command.

C.
Enter theigmp interface command in privileged mode.

D.
Enter the multicast interface command in configuration mode.