A nurse is teaching a patient who is to begin long-term therapy with prednisone to treat rheumatoid arthritis.The nurse should instruct the patient to take which of the following supplements while taking this medication?

Choice A rationalePrednisone, a corticosteroid, can decrease calcium absorption in the gut and increase calcium excretion by the kidneys. Long-term use can lead to bone demineralization and osteoporosis. Vitamin D is essential for calcium absorption, so supplementation helps mitigate these effects and maintain bone health. Normal serum calcium levels range from 8.5 to 10.5 mg/dL.Choice B rationalePantothenic acid (vitamin B5) is involved in various metabolic processes, and vitamin B6 is crucial for protein metabolism and nerve function. While important for overall health, there is no direct established link requiring their supplementation specifically due to prednisone therapy.Choice C rationaleBiotin (vitamin B7) is involved in carbohydrate and fat metabolism, and vitamin B12 is essential for red blood cell formation and nerve function. There is no strong scientific evidence indicating a specific need for biotin and vitamin B12 supplementation during long-term prednisone treatment.Choice D rationaleFolic acid (vitamin B9) is important for cell growth and DNA synthesis, and vitamin C (ascorbic acid) is an antioxidant involved in immune function and collagen synthesis. While beneficial for overall health, their supplementation is not specifically indicated to counteract the side effects of long-term prednisone therapy.