The nurse is caring for a 10-year-old child who has classic hemophilia. He is admitted with a swollen right knee that is very painful. The nurse should plan to include which of the following as a priority in the care of this child upon admission?

B Ambulation at least three times a day to prevent immobility complications D Offer 250 mL of fluid every hour to prevent hemarthrosis A Range-of-motion exercises to maintain joint mobility C A bed cradle to reduce pain