Answer:
Option A. More stringent codes of ethical behavior
Option B. Higher levels of education,
and
Option D. A greater commitment toward civic duty,
Step-by-step explanation:
The public employees have to adhere to stringent codes of ethical behavior because the public employees are professionals and professionals are always highly qualified personal. Their commitment towards the civic duty is high because they are obliged to act in the public interest and not act in a manner that his profession dignity gets affected. The level of experience, education, professionalism, adherence to ethical and company code, results in higher employee compensations.
Hence the Option A, B and D are correct options.