A. Corticosteroids are the mainstay of treatment for minimal change nephrotic syndrome, as they help reduce inflammation and proteinuria. B. Increased fluids are not typically prescribed for minimal change nephrotic syndrome unless dehydration is a concern. C. Antihypertensive agents may be needed if the child develops hypertension, but they are not the first-line treatment for minimal change nephrotic syndrome. D. Antibiotics are not indicated unless there is a concurrent infection.