Which Ethical Guideline Did Watson's Experiment with Little Albert Violate

Multiple Choice

Which ethical guideline did Watson's experiment with Little Albert violate?

A) Participants may withdraw from the study at any time, for any reason.
B) Participants must provide voluntary consent to participate in the study.
C) Participants should be offered information about the results of the study.
D) Researchers are not to use methods that may do physical or psychological harm.