Appropriate Positioning Procedures for a Lateral Lumbar Projection Include

Appropriate positioning procedures for a lateral lumbar projection include
1) align the vertebral column parallel with the imaging table.
2) align the shoulders, posterior ribs, and posterior pelvic wings perpendicular to the imaging table.
3) for a patient with scoliosis, the patient is positioned on the imaging table so that the central ray is directed into the abnormal spinal curve.
4) flex the patient's knees and place a pillow or radiolucent sponge between them.

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