Question: Upon successful deletion of an MBS User Data Ingest Session, what HTTP status code does the Network Exposure Function (NEF) return in the `Nnef_MBSUserDataIngestSession_Delete` response message to the Application Function (AF)?
Option 1: HTTP "200 OK" with the deleted resource details
Option 2: HTTP "202 Accepted" indicating asynchronous processing
Option 3: HTTP "404 Not Found" since the resource is deleted
Option 4: HTTP "204 No Content" indicating successful deletion without returning content
Explanation: The correct answer is Option 4 because, according to standard HTTP semantics, an HTTP "204 No Content" status code is returned when a server successfully processes a request but does not need to return any content in the response body, fitting for deletion operations where the outcome is simply the removal of the resource.