Why is it not advisable to change lanes frequently?

Your selected combination is correct because all three points highlight important reasons for avoiding frequent lane changes.

1. Increasing the risk of driving errors: Frequent lane changes can lead to mistakes, such as misjudging distances or not noticing other vehicles, which is significant in traffic safety regulations.

2. Minimal time gained: The actual advantage gained from changing lanes is often negligible, which means the risks taken may not justify the slight benefit.

3. Endangering other road users: Changing lanes unpredictably can create dangerous situations for other drivers, cyclists, and pedestrians, violating the principle of mutual consideration outlined in German traffic laws.

Understanding and adhering to these principles is vital for maintaining safety on the roads.