Which statement best describes the overall effect of alcohol and drugs on driving skills?

Which statement best describes the overall effect of alcohol and drugs on driving skills?

• A. They do not affect driving.
• B. They can sometimes improve reaction time.
• C. They affect motor skills in multiple ways simultaneously.
• D. They only affect vision.

Answer: (C)

Driving under the influence disrupts several functions your body uses to operate a vehicle. Steering, braking, and keeping the car in its lane rely on motor control and precise timing, while safe driving also depends on attention, perception, and quick decision making to respond to hazards. When alcohol or drugs are involved, these abilities are reduced across multiple areas at once, so overall driving performance is impaired in several ways simultaneously. That’s why this statement best captures the general effect. The other choices imply no effect, an improvement, or a limitation to vision, which don’t fit how substances impair driving.

Driving under the influence disrupts several functions your body uses to operate a vehicle. Steering, braking, and keeping the car in its lane rely on motor control and precise timing, while safe driving also depends on attention, perception, and quick decision making to respond to hazards. When alcohol or drugs are involved, these abilities are reduced across multiple areas at once, so overall driving performance is impaired in several ways simultaneously. That’s why this statement best captures the general effect. The other choices imply no effect, an improvement, or a limitation to vision, which don’t fit how substances impair driving.