Several Companies, Such as Procter & Gamble, General Foods, and Colgate-Palmolive

Several companies, such as Procter & Gamble, General Foods, and Colgate-Palmolive, have their own codes of behavior and criteria that determine whether advertisements are acceptable. Which type of self-regulation is this?

A) industry self-regulation
B) self-discipline
C) self-regulation with outside help
D) personal ethic
E) social ethic