Which breathing exercises would the nurse teach a client with the diagnosis of emphysema

Which breathing exercises would the nurse teach a client with the diagnosis of emphysema? geoquad A An inhalation that is prolonged to promote gas exchange geoquad B Abdominal exercises to limit the use of accessory muscles geoquad C Sit-ups to help strengthen the accessory muscles of respiration geoquad D Diaphragmatic exercises to improve controction of the diaphragm