Which of the Following Is Not Defined as an Act

Which of the following is not defined as an act discreditable in either the Rules or the Interpretations of the AICPA's Code of Professional Conduct?

A) The CPA firm's partner in charge failed to file his tax return for the past year.
B) The CPA firm discriminates in its hiring practices based on the age of the applicant.
C) The CPA retains the client's books and records to enforce past-due payment of the CPA's bill, even after the client has demanded they be returned.
D) The CPA firm's partner-in-charge was arrested recently on his way home from the firm's holiday party. He was a passenger in a car driven by his wife and she was charged with "driving while intoxicated."