A nurse is caring for a client who has a mild traumatic brain injury (TBI). Which of the following manifestations should the nurse immediately report to the provider?

A. A decrease in Glasgow Coma Scale (GCS) score from 13 to 9 indicates worsening neurological status and possible deterioration, which requires immediate medical evaluation. B. Pupils that are equal, round, and reactive are normal findings and not a concern. C. A mild drop in heart rate from 76 to 70 bpm is within normal limits and not immediately concerning. D. Repeated requests for narcotic pain medications may warrant assessment for pain or misuse but do not require immediate reporting compared to a significant GCS change.