1. An advertisement claims that three out of five dentists prefer a particular type of
toothpaste. After researching the study, you find that the toothpaste company paid for it.
Why should you be skeptical of the advertisement's claims?
O because the dentists are showing experimental bias
because only dentists were involved in the study
O because the organization that paid for the study is biased
O because you do not like the toothpaste being advertised​