A nurse is caring for a client who has type 1 diabetes mellitus. The nurse misread the client’s blood glucose level as 210 mg/dL instead of 120 mg/dL and administered an insulin dose appropriate for a reading over 200 mg/dL before breakfast. Which of the following actions is the nurse’s priority?

A. Reporting the error is necessary, but the client’s safety takes priority before administrative steps. B. Documentation is important, but the nurse must first address the client’s immediate risk. C. The priority after administering excess insulin is to monitor for hypoglycemia (shakiness, sweating, confusion, tachycardia), which can be life-threatening if not recognized and treated quickly. D. Carbohydrates are only given if signs of hypoglycemia develop. Preventive treatment without assessment may cause hyperglycemia.