A Lateral Thoracic Projection with Poor Positioning Demonstrates Closed Eighth

Multiple Choice

A lateral thoracic projection with poor positioning demonstrates closed eighth through twelfth intervertebral disk spaces. How was the patient mispositioned for such a projection to be obtained?
1) The central ray was not aligned perpendicular to the thoracic vertebrae.
2) The vertebral column was not aligned parallel with the imaging table.
3) A radiolucent sponge was not accurately positioned between the lateral surface of the patient and the imaging table.
4) The hips and knees were extended.

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