The nurse is completing a neurological assessment on a client with a head injury. The Glasgow Coma Scale (GCS) score is 14. Which intervention should the nurse implement?

Prepare to give phenytoin IV as prescribed.

Perform a substernal rub to evoke a response to pain.

Promptly notify the healthcare provider (HCP) of the GCS score.

Continue monitoring the client's GCS score every 2 hours.