Postural Drainage Should Be Considered in Which of the Following

Postural drainage should be considered in which of the following situations?
1) In patients with chronic obstructive lung disease
2) In patients who expectorate more than 25 to 30 ml sputum per day
3) In the presence of atelectasis caused by mucus plugging
4) In patients with cystic fibrosis or bronchiectasis

A) 1 and 3 only
B) 1, 2, and 3 only
C) 3 and 4 only
D) 2, 3, and 4 only