What can be the effects of even small quantities of alcohol?

The selected combination of answers is correct as all three effects – delayed reactions, reckless driving, and impairment of hearing and vision – highlight the dangers of alcohol consumption while driving. According to German traffic regulations, even small amounts of alcohol can significantly affect a driver's capabilities.

1. Delayed reactions can lead to slower responses to traffic signals or unexpected hazards, increasing the risk of accidents.
2. Reckless driving can stem from impaired judgment, leading to risky maneuvers like speeding or aggressive driving.
3. Impairment of hearing and vision affects a driver's ability to perceive their surroundings accurately, crucial for safe driving.

Each of these effects underlines the importance of remaining sober while operating a vehicle, as they can severely compromise road safety and lead to legal consequences. Understanding these dangers is vital for responsible driving practices.