Marijuana and LSD are considered to be

A) depressants.
B) stimulants.
C) hallucinogens.
D) barbiturates.

Hallucinogens

A class of psychoactive substances that cause changes in perception, mood, consciousness, and thought patterns, often resulting in visual or auditory hallucinations.

Marijuana

A psychoactive drug from the Cannabis plant, used for medical or recreational purposes.

LSD

Lysergic Acid Diethylamide, a powerful psychoactive drug that induces altered states of awareness, perceptions, and feelings.