LSD is a very powerful and dangerous drug, which changes the perception of the reality of the users. This drug provides a sense of "trip", where the experience of such a created "reality" is completely irrational. People who use LSD can feel excited, overjoyed, but also paranoia and hallucinations, when they can "see" and "hear" things that are not real. In many cases, the so-called "bad trip" the consumer may have terrifying hallucinations, and misjudge dangerous situations, so they want to fly or kill. In the long term, the effects can be flashbacks, as well as mental health deterioration, depression, anxiety and schizophrenia.
The answer is a.
