Which of the Following Describes Normal Changes in the Respiratory

Which of the following describes normal changes in the respiratory system of the older adult?

A) Severe dyspnea is experienced on exertion resulting from changes in the lungs.
B) Respiratory muscle strength increases to compensate for a decreased vital capacity.
C) There is a decrease in small airway closure,leading to problems with atelectasis.
D) The lungs are less elastic and distensible,decreasing their ability to collapse and recoil.