Question: What does a Presence-Reporting-Area-Status AVP value of '0' indicate about the User Equipment's (UE) location in relation to the presence reporting area?
Option 1: The UE is inside or has just entered the presence reporting area.
Option 2: The UE is outside or has just left the presence reporting area.
Option 3: The presence reporting area functionality is temporarily suspended for the UE.
Option 4: The serving node cannot determine the UE's location relative to the area.
Explanation: This is correct because a Presence-Reporting-Area-Status AVP value of '0' (In area) signifies that the User Equipment (UE) is either currently inside the presence reporting area or has just entered it.