An Acanthioparietal Facial Bone Projection (Waters Method) with Poor Positioning

Multiple Choice

An acanthioparietal facial bone projection (Waters method) with poor positioning demonstrates the petrous ridges too far inferior to the maxillary sinuses. How could the positioning setup be adjusted for an optimal projection to be obtained?
1) Depress the patient's chin.
2) Align the central ray parallel with the MML.
3) Align the MML perpendicular to the IR.
4) Adjust the central ray angulation caudally.

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