Which Statement About Divulging the True Purpose of an Experiment

Multiple Choice

Which statement about divulging the true purpose of an experiment is true?

A) The psychologist need not divulge the true purpose of an experiment.
B) The psychologist must divulge the true purpose of the experiment before the subject participates.
C) The psychologist must divulge the true purpose of the experiment only after it has been published.
D) The psychologist must divulge the true purpose of the experiment after the person participates.