Question: What triggers the increment of the 'Number of AF session with QoS creation requests' measurement in a 5G network?
Option 1: Receipt of an `Nnef_AFsessionWithQoS_Create` request by the Network Exposure Function (NEF) from an Application Function (AF)
Option 2: Successful creation of an AF session with QoS, indicated by a response from the NEF to an AF
Option 3: A change in the Quality of Service (QoS) settings for an existing AF session
Option 4: The expiration of a timer related to AF sessions with QoS requests
Explanation: This measurement increments upon the NEF receiving a specific request type (`Nnef_AFsessionWithQoS_Create`) from an AF, highlighting the interaction between these network elements in managing QoS for applications.