Why Is It That Most Nursing Positions Are Held by Those

Why is it that most nursing positions are held by those classified as "baby boomers?"

A) The era when then people came of age was a time of great advancement in healthcare and many people wanted to become a part of that movement.
B) Most nurses are women and when baby boomers were coming of age, the two professions most accepting of women were nursing and teaching.
C) This group is hard working and loyal, which are attributes that are often found in nurses.
D) This generation is focused on material gain and nursing provides a good salary structure.