The nurse is preparing for discharge a client with a history of celiac disease who now has developed multiple sclerosis. Which instruction is most important for the nurse to include in the discharge teaching plan?

A. While avoiding extreme temperatures may be beneficial for individuals with multiple sclerosis, it is not as critical as medication adherence. B. Increasing sodium intake is generally not indicated unless specifically advised by a healthcare provider. C. Using a walker is helpful for safety during weakness, but ensuring medication compliance is more crucial. D. Accurate administration of prescribed cortisone is vital for managing the symptoms and preventing exacerbations of both celiac disease and multiple sclerosis.