Question: What is the purpose of an AF invoking Nnef_MemberUESelectionAssistance_Subscribe service operation with Service Experience filtering criteria?
Option 1: To receive a list of UEs that are currently connected to the network.
Option 2: To retrieve information about the UE's current location.
Option 3: To get a list of available services for a specific UE.
Option 4: To obtain a list of UEs that fulfill specific Service Experience criteria, such as location, time window, Application ID, and Service Experience type.
Explanation: The AF invokes the Nnef_MemberUESelectionAssistance_Subscribe service operation to receive a list of UEs that meet specific Service Experience filtering criteria. This allows the AF to select UEs based on various factors such as location, time window, Application ID, and Service Experience type, which is useful for optimizing network resources and improving user experience.