Colin has agreed to take part in a study on "preferences for different fast foods". when he arrives for the study, he is asked to read an account of a sexual assault and to indicate the guilt and punishment he would assign to the assailant. this procedure best illustrates

This procedure best illustrates "the use of deception".

Deception happens as the consequence of specialists giving false or deficient data to members to mislead research subjects.  

The IRB acknowledges the requirement for specific kinds of concentrates to utilize techniques that incorporate deception. However, work of such systems must be advocated. As a rule, deception isn't adequate if, in the judgment of the IRB, the member may have declined to take an interest had they been educated of the genuine motivation behind the examination.

answer; /// (c) i do believe that the correct answer is ; an unstated guarantee that goods will be to the consumer's liking;