Question: Upon receiving a Charging Data Response [Update] with a response code indicating unsuccessful processing, what action(s) may a NF Consumer (CTF) take?
Option 1: Perform error handling applicable to the response code and may send a Charging Data Request [Termination] to the CHF.
Option 2: Ignore the error and continue with the next Charging Data Request [Update].
Option 3: Only perform error handling applicable to the response code, without any further requests.
Option 4: Send a new Charging Data Request [Initial] to restart the process.
Explanation: According to response code handling rules, if an update is unsuccessfully processed, the NF Consumer (CTF) should perform error handling specific to that response code and may also send a Charging Data Request [Termination] to the CHF for managing and potentially closing the charging process due to the update failure.