When a Survey Respondent Does Not Answer Honestly, How Are

When a survey respondent does not answer honestly, how are they probably forming responses?

A) They probably are underreporting behaviors that are embarrassing or that could be illegal.
B) They are probably overreporting behaviors that are bizarre or extreme in order to invalidate the survey results.
C) They are probably randomly making responses to questions.
D) They may hide information that they either fear or are embarrassed to reveal, or they may exaggerate to get attention or to play with the survey.