Which command configures a Source Specific Multicast on a Cisco IOS XR router?
A. configuremulticast-routing address-family ipv4interface all enableexitrouter igmpversion 3commit
B. configuremulticast-routing address-family ipv4interface all enableexitrouter igmpversion 2commit
C. configuremulticast-routing address-family ipv4interface all enableexitrouter igmpversion 1commit
D. configureinterface all enableexitrouter igmpversion 3commit