Answer:
.C) debrief participants after the study is complete.
Step-by-step explanation:
Generally based on APA ethics guidelines ,Psychologists are mandated to provide detail information to the research participants. This is needed to protect the research participants from any harm, to respect their rights and dignity.
In this case the participant s should be debriefed by Aron , to allay any fear or misconception about the research, and to provide them with sound knowledge and dignity. With this practise Aron made them to realize the value of the time spent for the research.Thus as the participant are leaving the research lab. they are filled with the same mindset that they had before submission for the research-anxiety is removed.