Lateral Projections of the Chest Are Taken with the Left

Lateral projections of the chest are taken with the left side against the IR because:

A) lung conditions are more common on the left side.
B) it is conventional to have a routine standard, and the left has been established as the standard.
C) magnification of the cardiac silhouette is reduced with the left side nearer the IR.
D) the right hilum provides high-contrast details that may be confusing.