Angelica Took Part in a Research Study Where She Had

Angelica took part in a research study where she had to sit alone in a darkened room for 30 minutes before completing a brief questionnaire about her future goals and plans.When she had completed the questionnaire, she was told the experiment was over.Angelica never really understood the purpose of the study, and she wasn't sure why she had to wait in the darkened room before filling out the short questionnaire.In this case, it would appear that the researchers who conducted the experiment:

A) violated Angelica's right to confidentiality
B) failed to obtain informed consent
C) did not use an adequate debriefing procedure
D) did not provide adequate protection from potential harm