Question: When a Mission Critical (MC) service user migrates to a partner MC system, utilizing the home Public Land Mobile Network (PLMN) of the primary MC system is allowed, but what is the primary reason for recommending the use of the home PLMN of the partner MC system instead?
Option 1: To simplify billing and charging processes between MC service providers.
Option 2: To ensure consistent meeting of service-level delay requirements, especially when the two home PLMNs are geographically far apart.
Option 3: To mandate a uniform security policy across all MC systems for migrated users.
Option 4: To eliminate the need for 5GS-level roaming between the primary and partner MC systems.
Explanation: The correct answer highlights the importance of maintaining service quality, particularly in terms of delay, which can be compromised if the primary and partner MC systems' home PLMNs are geographically distant. This ensures consistent meeting of service-level delay requirements.