Question: Where can the API Management Function, responsible for auditing service API invocation, potentially reside according to architectural requirements?
Option 1: Exclusively within the UE (User Equipment) trust domain
Option 2: Solely within a Public Land Mobile Network (PLMN) trust domain
Option 3: Only with trusted Third-Party Application Servers
Option 4: Either within a PLMN trust domain or within a 3rd party trust domain
Explanation: This reflects the flexibility in architectural requirements for auditing service API invocation, allowing residence either within a trusted Public Land Mobile Network (PLMN) or a trusted third-party provider's domain, accommodating various deployment scenarios while ensuring security and functionality.