Which of the Following Statements About Debriefing Participants Who Have

Which of the following statements about debriefing participants who have taken part in a study that used deception is FALSE?

A) Even very long delays in providing the debriefing pose no ethical issues.
B) The explanation of the deception must be unambiguous.
C) Participants must perceive the explanation of the deception to be valid.
D) Participants should be warned that they might have doubts about whether they were actually deceived.