Which of the following statements about hallucinogens is true?

• A. They can alter color perception.
• B. They can increase physical strength.
• C. They can cause disorientation or mood swings.
• D. They can cause visions or extreme changes in one's mood.

Answer: (C)

Hallucinogens disrupt how the brain processes sensory information and emotions, which often leads to disorientation and mood swings. This broad, pervasive effect comes from how these substances alter neurotransmitter activity, making it hard to stay oriented in space and to regulate feelings, so people may feel confused, unsettled, or emotionally volatile. Although some users may notice color changes or even visions, those phenomena are variable and not as universally predictable as the general experience of disorientation and mood swings. Increasing physical strength is not a typical or expected effect of hallucinogens.