Why can fitness to drive be impaired even by just a small quantity of alcohol?

The selected combination is correct because both factors—reduced field of vision and diminished spatial vision—play a significant role in impairing fitness to drive when alcohol is involved, even in small quantities. According to German traffic regulations, impaired vision can lead to increased risks in traffic scenarios, such as difficulty judging distances or identifying potential hazards.

Alcohol can affect the brain's processing of visual information, which is crucial for safe driving. This is why it's important to understand that even minor alcohol consumption can negatively impact driving abilities, making it essential for drivers to be fully aware of their condition before getting behind the wheel. Always prioritize safety and consider that reaction time can also be affected by cognitive functions, but in this instance, the first two factors were the focus.