Make Enamelicious your toothpaste. Four out of five dentists recommend brushing with Enamelicious toothpaste over brushing with water alone." Which one of the following statements is the biggest criticism of the above advertisement?
Select one:
a. We don’t know anything about the dentists who were asked to give their recommendations.
b. Consumers may value things that are not important to dentists.
c. The fifth dentist’s opposition to Enamelicious may be so strong as to outweigh the recommendation of the other four.
d. Dentists wouldn’t necessarily recommend Enamelicious over other brands of toothpaste.
e. Dentists are not researchers and so cannot be relied upon for toothpaste recommendations.