For a PA Oblique Sternal Projection (RAO Position)

For a PA oblique sternal projection (RAO position) ,
1) a 30-inch (76-cm) or 40-inch (100-cm) SID is used.
2) the patient's midcoronal plane is angled 15 to 20 degrees with the IR.
3) a long exposure time is used.
4) costal breathing is used.

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