Question: In a scenario where the same MBMS User Service is utilized across multiple access technologies (e.g., GERAN, UTRAN, and E-UTRAN), what condition must be met for both UTRAN and E-UTRAN to share the same MBMS Bearer Service?
Option 1: The BM-SC must execute header compression for the MBMS service.
Option 2: Different IP multicast addresses must be allocated for each access technology.
Option 3: The BM-SC must not execute header compression for the MBMS service.
Option 4: Separate TMGIs are required for UTRAN and E-UTRAN.
Explanation: This is because, as per the specifications, the same MBMS bearer service for both UTRAN and E-UTRAN may be used if (and only if) the BM-SC does not execute header compression for the MBMS service. This ensures compatibility and seamless data transfer across these access technologies without the complexity introduced by header compression.