Question: What triggers the migration of an MC (Mission Critical) service user between two MC systems, according to the defined functional architecture?
Option 1: Expiration of the user's service subscription
Option 2: Geographical changes detected by the MC service client or initiated by the primary MC system
Option 3: Automatic system updates in the primary MC system requiring temporary relocation of services
Option 4: Security breaches in the partner MC system necessitating immediate user migration
Explanation: The correct answer highlights that migration can be triggered by geographical changes: either the primary MC system initiates it or the MC service client requests it due to its own geographical movements, ensuring continuous service availability despite physical location changes, crucial for mission-critical services relying on seamless connectivity.