Samantha Took Part in a Study That She Was Told

Samantha took part in a study that she was told was investigating the relationship between future goals and school grades. First, she sat alone in a room with a plate of cookies in front of her for 30 minutes. After that she was asked to complete a brief questionnaire about her future goals and plans. After she completed the survey Samantha was told that the researchers were not interested in her answers to the questionnaire, instead they actually counted the number of cookies Samantha ate while in the room alone. In this case, it would appear that the researchers who conducted the experiment used

A) a double-blind procedure.
B) experimenter bias.
C) deception.
D) a social desirability bias.