Vincent is considering buying a creatine supplement after he saw a variety of these ergogenic aids advertised in a fitness magazine. Which of
the following is a common deceptive marketing tactic that he should watch out for?

A. an offer for a free mail-order anabolic assessment

B. a recommendation to assess body composition through underwater weighing
C.evidence about creatine's effect on resistance exercise and sprinting
D. a warning about creatine's short-term side effects