Question: What is the primary purpose of the Nnef_ChargeableParty_Create service operation in the 5G System?
Option 1: To request a new IP address for a UE.
Option 2: To allow a consumer to become the chargeable party for a data session for a UE.
Option 3: To update the sponsoring status of an existing data session.
Option 4: To retrieve the transaction reference ID for a previous data session.
Explanation: The Nnef_ChargeableParty_Create service operation is used by a consumer to request becoming the chargeable party for a data session for a UE, as described in the inputs and description of the service operation. This allows the consumer to take responsibility for the charges associated with the data session.