Which of the Following Statements About the Use of Deception

Which of the following statements about the use of deception in research with children is consistent with ethical guidelines?

A) Deception should never be used in research with children.
B) Deception is acceptable only if the subjects are below age 5.
C) Researchers who wish to use deception must pilot the experiment with adults first.
D) If there is reason to believe that the children will be negatively affected by the deception, the researcher is obliged to provide some means to reduce those feelings at the end of the study.