In a Hospital,nurses Are Paid Less Than Janitors

In a hospital,nurses are paid less than janitors.The nurses need more education to become nurses than the janitors need to become janitors.The janitors must lift heavier objects than the nurses,but the nurses have more responsibility than the janitors.This discrimination in the amount paid to nurses and janitors is:

A) legal, because the jobs are not similar.
B) illegal, because the nurses need more education.
C) illegal, because the nurses have more responsibility.
D) legal, because the janitors need to lift heavier items.
E) legal, because the nurses have better working conditions than do the janitors.