According to Federal Regulations and Ethical Guidelines of Professional Societies

According to federal regulations and ethical guidelines of professional societies such as the American Sociological Association,

A) researchers should use all possible means to protect the confidentiality of information provided by research participants.
B) study results should be revealed during the debriefing session.
C) subjects should not be informed of the use of deception if this revelation will be harmful or unpleasant.
D) subjects may be informed that they cannot discontinue their participation once they have volunteered to participate in research.