In what situation is it especially dangerous to perform a turn?

The selected combination of choices is important as it highlights specific scenarios where turning can be particularly hazardous.

1. **Before the crest of a hill**: Visibility is often limited, making it difficult to see oncoming traffic or potential obstacles. According to German traffic regulations, drivers are required to ensure safe visibility and distance before making maneuvers.

2. **Before bends in the road**: Similar to hills, bends can obstruct visibility. Drivers may not be able to see if there are other vehicles or pedestrians nearby, increasing the risk of accidents. The road safety code emphasizes the need for caution in such situations.

3. **In foggy conditions**: Fog significantly reduces visibility, making it crucial for drivers to be especially vigilant when turning. The regulations state that drivers must adjust their driving behavior according to visibility conditions to ensure safety.

By recognizing these factors, drivers can make more informed decisions and reduce the likelihood of accidents, promoting safer road usage.