Indications for Incentive Spirometry Include Which of the Following According

Indications for incentive spirometry include which of the following according to the American Association for Respiratory Care (AARC) Clinical Practice Guideline: Use of Positive Airway Pressure Adjuncts to Bronchial Hygiene Therapy?
I. air trapping in asthma and COPD
II. mobilization of secretions
III. prevention or reversal of atelectasis
IV. optimization of bronchodilator delivery

A) I
B) I and II
C) I, II, and III
D) I, II, III, and IV