An independent medical research team recently did a survey at a mountain retreat founded to help heavy smokers quit or cut down on their cigarette smoking. Eighty percent of those persons smoking three packs a day or more were able to cut down to one pack a day after they began to take End-Smoke with its patented desire suppressant. Try End-Smoke to help you cut down significantly on your smoking.
Which of the following, if true, offers the strongest criticism of the advertisement?
(A) Heavy smokers may be psychologically as well as physically addicted to tobacco smoking.
(B) Of the 20 percent who failed to achieve significant results, most were addicted to other substances as well.
(C) The independent medical research team included several members who were experts in the field of nicotine addiction.
(D) A survey conducted at a mountain retreat to aid smokers may yield different results than one would expect under other circumstances.
(E) The overall percentage of the general population who smoke regularly has not declined dramatically over the past 20 years.