Which Statement Regarding Deception in Psychological Research Is True

Which statement regarding deception in psychological research is true?

A) Deception cannot be used.
B) Deception is a standard practice to minimize demand characteristics and does not need to be justified.
C) Deception cannot be used if it puts participants at risk of harm or pain.
D) Deception involving exposure to harm or pain is only justified if debriefing is provided.