Question: What triggers the AMF to determine whether I-SMF needs to be inserted when a UE moves a PDU Session from EPS to 5GS?
Option 1: The type of service being used by the UE.
Option 2: The UE location and the service area of the SMF+PGW-C.
Option 3: The availability of I-SMF in the network.
Option 4: The speed at which the UE is moving.
Explanation: When a UE moves a PDU Session from EPS to 5GS, the AMF needs to determine whether I-SMF needs to be inserted. This decision is based on the UE's location and the service area of the SMF+PGW-C, as these factors will impact the routing of traffic and the provision of services to the UE.