Complete the sentence:
State registration boards, boards of ethical review, oversight committees, and internal audit departments are used in industry and government because:___.
I. illegal and unethical actions must be punished.
II. people must be shown that the rules will be enforced.
III. there is something to be learned from all errors in judgment.
(A) I only
(B) II only
(C) Ill only
(D) I, II, and Ill