A Researcher Wants to Gather Accurate Data on Cybersex, Fantasies

A researcher wants to gather accurate data on cybersex, fantasies, and infidelity. Which method should he use to get the most honest responses?

A) He should conduct face-to-face interviews so he can score the participants' comfort level and gestures.
B) He should conduct face-to-face interviews because participants are more honest when speaking to another person.
C) He should conduct face-to-face interviews because participants will give more detail when speaking to another person.
D) He should let participants enter their responses into a computer because they will be more honest about activities that they consider morally wrong.
E) He should let participants choose how they report data because face-to-face interviews and anonymous surveys produce identical results.