While Caring for a Client After a Thermal Injury, the Nurse

While caring for a client after a thermal injury, the nurse finds that the client is showing signs and symptoms of hyperkalemia. Which is the most important nursing intervention for this client?

A) Administering oral fluids to the client frequently
B) Applying a topical antibiotic on the burns as prescribed
C) Elevating the head of the client's bed immediately
D) Monitoring cardiac function through electrocardiogram