Which definition describes psychoactive drugs?
a. drugs that act as sedatives and slow down activity and make a person calm, sleepy, or even unconscious
b. drugs that are derived from opium as well as drugs that have similar chemicals but are man-made
c. drugs that energize behavior and are often used to a person stay awake, lose weight, or elevate mood
d. drugs that have chemicals that influence perceptions, moods, consciousness, or behavior

Drugs that have chemicals that influence perceptions, moods consciousness or behavior

psychoactive drug - a drug that can produce mood changes and distorted perceptionsconsciousness-altering drug, mind-altering drug, psychoactive substancedesigner drug - a psychoactive drug deliberately synthesized to avoid anti-drug laws; mimicsthe effects of a banned drug; law was revised in 1986 to ban designer drugsdronabinol - psychoactive substance present in marijuana; used therapeutically to controlnausea associated with cancer therapydrug - a substance that is used as a medicine or narcoticeuphoriant - a psychoactive drug that tends to produce elation and euphoriahallucinogen, hallucinogenic drug, psychedelic drug, psychodelic drug - a psychoactive drug thatinduces hallucinations or altered sensory , THC - psychoactive substance present in marijuana

Hope this helps.