Question: What triggers the AMF to invoke Nsmf_PDUSession_UpdateSMContext to update the status of EPS interworking support in the SMF for a PDU Session via 3GPP?
Option 1: Change in UE's location
Option 2: Change in UE's subscription data, such as Core Network Type Restriction to EPS, or change of 5GMM capability
Option 3: Handover from one gNB to another
Option 4: Establishment of a new PDU Session
Explanation: According to the text, the AMF initiated modification is triggered by changes in the UE's subscription data (e.g., Core Network Type Restriction to EPS) or change of 5GMM capability (e.g., "S1 mode supported"). This requires the AMF to invoke Nsmf_PDUSession_UpdateSMContext to update the status of EPS interworking support in the SMF.