Author Jacob Maslow Offers Guidelines to Keep Marketers from Falling

Author Jacob Maslow offers guidelines to keep marketers from falling prey to unethical practices. Which guideline is not one suggested by Maslow?
A)Remain transparent at all times.
B)Never give cause for privacy concerns.
C)Always credit when resharing someone else's content.
D)Always divulge your affiliation.
E)Never sell anything to a customer who has not given an informed consent.