Which of the Following Is One of the Ethical Principles

Multiple Choice

Which of the following is one of the ethical principles that psychologists must follow when using human participants? All participants must be

A) contacted six months after the study to assure that no psychological harm resulted.
B) compensated in some way for their participation in research.
C) informed of the true nature of the study upon arriving at the laboratory.
D) informed that they can withdraw from the study at any time.
E) over the age of 18.