The nurse is caring for the patient experiencing Guillain-Barre Syndrome (GBS). It is most important for the nurse to monitor the patient for which complication?

A. Hyperglycemia is not a primary complication of GBS. B. Respiratory failure is a critical and life-threatening complication due to paralysis of the respiratory muscles in GBS; close monitoring of respiratory status is essential. C. Urinary retention can occur but is less immediately life-threatening than respiratory failure. D. Hypertension is not commonly associated with GBS; autonomic dysfunction may cause blood pressure fluctuations but respiratory failure remains the priority.