13. Which of the following is not an ethical principle regarding research on humans? 1 point
a. Researchers must protect participants from needless harm and discomfort
Participants must take part in the study on a voluntary basis
c. Personal information about individual participants must be kept confidential
d. Research studies must be fully explained to participants when the study is
completed
e. Participants should always be informed of the hypothesis of the study before they
agree to participate