Some Tribal Cultures Have Relied on Hallucinogens to Communicate with Spirits

Some tribal cultures have relied on hallucinogens to communicate with spirits and ancestors. Which of the following is true?

A) Research suggests that a spirit world probably does exist, but we can't normally see it because of our inhibitions.
B) Hallucinogens distort sensory experiences and blur the boundaries between what's real and what's fantasy.
C) Only tribal people report having religious experiences with hallucinogens.
D) Hallucinogens produce hallucinatory effects only the first few times you take them.
E) Hallucinogens only produce hallucinatory effects after the first few times you take them.