Question: In a roaming scenario for Multimedia Broadcast/Multicast Service (MBMS), where a visited Public Land Mobile Network (PLMN) offers its own MBMS user services to roaming users, which entity provides the MBMS user traffic if both the visited and home PLMN support the same classes of MBMS user services?
Option 1: Gateway GPRS Support Node (GGSN) in the Home PLMN
Option 2: Broadcast Multicast Service Centre (BM-SC) in the Visited PLMN, proxied through the Home PLMN's BM-SC
Option 3: Serving GPRS Support Node (SGSN) in the Visited PLMN
Option 4: Broadcast Multicast Service Centre (BM-SC) in the Visited PLMN
Explanation: When a visited PLMN offers its own MBMS user services to roaming users and both the visited and home PLMN support the same classes of MBMS user services, the MBMS user traffic is provided directly by the Broadcast Multicast Service Centre (BM-SC) in the Visited PLMN. This ensures efficient and direct content distribution to roaming users, following authorization involving the Home PLMN's BM-SC.