Which command configures a Source Specific Multicast on a Cisco IOS XR router?

A.
configure
multicast-routing address-family ipv4
interface all enable
exit
router igmp
version 3
commit

B.
configure
multicast-routing address-family ipv4
interface all enable
exit
router igmp
version 2
commit

C.
configure
multicast-routing address-family ipv4
interface all enable
exit
router igmp
version 1
commit