Question: Which of the following BM-SC (Broadcast-Multicast Service Centre) sub-functions is specifically related to optimizing data transmission for critical communications over E-UTRAN?
Option 1: Membership function
Option 2: Session and Transmission function
Option 3: Header compression for Mission Critical services using MBMS in E-UTRAN
Option 4: Service Announcement function
Explanation: The correct answer optimizes bandwidth usage by reducing the overhead of mission-critical MBMS data transmissions over E-UTRAN, efficiently supporting latency-sensitive and high-priority communications, such as public safety or emergency response scenarios.