Dr. Dickinson is investigating the link between social support networks and grades in school. Students in his classes are required to complete survey forms related to this research. If a survey form is not completed by the end of the semester, a student's grade is reduced by 10 points. In this case, some researchers might argue that Dr. Dickinson's research violates the ethical principle of O a) a) right to privacy. b) full disclosure. c) voluntary participation. d) protection from harm.