Castiel Is a Psychologist Who Is Interested in Seeing How

Multiple Choice

Castiel is a psychologist who is interested in seeing how autonomic nervous system responses are related to subjective feelings of fear. Half the participants in Castiel's experiment watch a 10-minute graphic and violent video and the other half watch a 10-minute video of a baby kitten. While the participants are watching the video, Castiel gathers measurements of their skin conductance. After they finish watching the video the participants answer a questionnaire about their level of fear after watching the video as well as how they generally react to horror movies.
-While watching the violent video one of the participants becomes very distressed and asks to leave.What should Castiel do

A) Allow the participant to leave.
B) Tell the participant they can't leave because they signed an informed consent.
C) Allow the participant five minutes to calm down and resume the experiment.
D) Have the participant watch the kitten video instead.