Heather reported a boost in energy and a sense of well-being after taking a drug.Medical tests revealed increased activity of her central nervous system.The drug she took is most likely a

A) depressant.
B) tranquilizer.
C) hallucinogen.
D) stimulant.

Central Nervous System

The central nervous system consists of the brain and spinal cord, functioning as the primary processing center for the body's nervous system.

Stimulant

A substance that raises levels of physiological or nervous activity in the body, typically used to increase alertness, energy, or physical performance.

Tranquilizer

A drug used to reduce tension or anxiety, often by depressing nerve function.