13. A Washington Post article reported that psilocybin, the active ingredient of magic mushrooms, promoted a mystical experience in two-thirds of people who took it for the first time, according to a study published comparison compound administered under comfortable, supportive conditions. The statement that it was a double-blind experiment means that: Neither the subjects oresearchers knew that the substance being administered would cause a mystical experience. All that they knew was that some substance was being administered, which may or may not have an effect. Neither the subjects nor researchers knew that the substance being administered was psilocybin. All that they knew was that a substance, which would cause a mystical experience, was being administered. Neither the subjects nor researchers knew that the substance being administered would cause a mystical experience. All that they knew was that the substance being administered was an active ingredient of magic mushrooms Neither the subjects nor researchers knew that the substance being administered would cause a mystical experience. All that they knew was that a substance called psilocybin was being administered. Double-blind means that neither the subjects nor researchers who work with them know the treatment the subject is receiving. How would that be accomplished in this instance