Self-Regulatory Codes of Ethics for Professions,such as Accountants Means

Self-regulatory codes of ethics for professions,such as accountants means:

A) they are likely to be more lenient than legal rules and regulations enforced by the courts
B) they can forestall action by government regulatory bodies such as the Australian Securities and Investments Commission
C) they are developed and imposed by professionals who understand the problems of practitioners
D) All of the above are advantages