Choice "B" is correct. Under Rule 502 of the Code of Professional Conduct, advertising that is not false, misleading or deceptive is permitted by the CPA.
Choice "d" is incorrect. Advertising that is informative and objective is allowed under Rule 502.
Choice "c" is incorrect. Rule 502 states that false, misleading or deceptive advertising is not allowed.
Choice "a" is incorrect. Mass mailings are not the only form of advertising allowed. Be careful of choices including the words "all, always, must, only, and never."