For an AP Oblique Rib Projection (RPO or LPO Position)

For an AP oblique rib projection (RPO or LPO position) obtained to evaluate upper posterior rib pain,
1) a 70- to 80-kVp technique is used.
2) the tenth axillary rib is centered to the collimated field.
3) the patient is rotated 45 degrees away from the affected side.
4) the image is obtained after deep expiration.

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