Oxygen at the rate of 2 liters per minute through nasal cannula is prescribed for a client with chronic obstructive pulmonary disease (COPD). Which of the following statements best describes why the oxygen therapy is maintained at a relatively low concentration? O The oxygen will be lost at the client's nostrils if given at a higher level with a nasal cannula. The client's long history of respiratory problems indicates that he would be unable to absorb oxygen given at a higher rate. The client's respiratory center is so used to high carbon dioxide and low oxygen levels that changing these levels may eliminate his stimulus for breathing. O The cells in the alveoli are so damaged by the client's long history of respiratory problems that increased mygen levels and reduced carbon dioxide levels likely will cause the cells to burst.