Which statement best defines why ethanol is classified as a central nervous system (CNS) depressant?

• A. It reduces the speed and efficiency of neuronal signaling in the brain, producing slowed cognition and reflexes.
• B. It selectively increases the release of excitatory neurotransmitters in the cortex while suppressing metabolic enzymes in the liver to indirectly alter brain activation patterns.
• C. It acts as an enzyme inhibitor in skeletal muscle tissue causing peripheral muscle relaxation without affecting central neural transmission.
• D. It functions primarily by stimulating peripheral nerves to enhance sensory perception and motor reflexes during acute use, which leads to increased alertness in small doses but sedation in larger amounts.

Answer: (A)