An upper-level psychology class is conducting an experiment on racial prejudice that involves having participants rate the likability of faces in a set of photos. However, they tell participants that...

An upper-level psychology class is conducting an experiment on racial prejudice that involves having participants rate the likability of faces in a set of photos. However, they tell participants that the study is about the effects of aging on likability, which not not true. When participants are finished, they are thanked for their time and leave the experiment. In this example, the class forgot to ________ in order to resolve the ________ in the study.

A) pay participants; use of personal photos