How Can the Positioning Setup Procedure Be Adjusted for an AP

Multiple Choice

How can the positioning setup procedure be adjusted for an AP axial foot projection to demonstrate uniform image density throughout the toes and foot areas?
1) Position the toes at the anode end of the x-ray tube.
2) Use a kVp above 75.
3) Use a grid.
4) Place a contact shield over the toes.

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