To avoid driving impaired, which of the following should a driver not use?

The correct answer is focused on understanding how certain substances can impair driving abilities. Drugs that may limit a driver's abilities can include a wide range of medications or substances, not just illicit drugs. This encompasses various over-the-counter medications, prescription drugs, or even legal substances that can alter one’s perception, reaction time, or judgment.

Using substances that could impair cognitive functions or motor skills poses a significant risk when driving, as they can diminish a driver’s ability to react to changing road conditions or make sound decisions. This is why it's crucial for drivers to be aware of and avoid any drugs that have the potential to impair their driving abilities, regardless of whether they are legal or prescribed. Such awareness can help prevent accidents and promote road safety.

In contrast, prescription medications taken as directed are generally safe if they do not have side effects that impair driving. Caffeinated beverages can help maintain alertness but do not impair abilities in the same way. Non-alcoholic drinks also do not limit driving capabilities, contributing to hydration without the risks associated with impaired driving.