All of the Following Are Questions Used to Determine Whether

All of the following are questions used to determine whether the experimental procedures treat a research participant unethically EXCEPT _____.

A) Is the research subject subjected to substantial or psychological trauma?
B) Can the research subject be easily returned to his or her initial state?
C) Has the research subject provided consent to participate in an experiment?
D) Is the research participant informed of the purpose of the experiment prior to participating?