Which configuration step is the first to enable PIM-SM on the Cisco ASA appliance?

Which configuration step is the first to enable PIM-SM on the Cisco ASA appliance?
A. Configure the static RP IP address.
B. Enable IGMP forwarding on the required interface(s).
C. Add the required static mroute(s).
D. Enable multicast routing globally on the Cisco ASA appliance.
E. Configure the Cisco ASA appliance to join the required multicast groups.