Which of the Following Statements Is True of Lung Capacity

Multiple Choice

Which of the following statements is true of lung capacity in middle age?

A) There is significant change in lung capacity through most of middle adulthood.
B) In late middle age, the proteins in lung tissue become more elastic.
C) Stiffening of the chest wall decreases the lungs' capacity to shuttle oxygen.
D) The lung capacity of smokers increases drastically in middle age.