If a Patient's Chest Radiograph Shows Infiltrates in the Posterior

If a patient's chest radiograph shows infiltrates in the posterior basal segments of the lower lobes, what postural drainage position would you recommend?

A) head down, patient supine with a pillow under knees
B) patient prone with a pillow under head, bed flat
C) patient supine with a pillow under knees, bed flat
D) head down, patient prone with a pillow under abdomen