When do road test failures commonly occur?

Road test failures commonly occur due to difficulties in obeying traffic laws and a lack of skill. This encompasses a range of critical driving behaviors, such as not obeying speed limits, running stop signs or red lights, and not yielding to pedestrians or other vehicles. A solid understanding of the rules of the road is essential for any driver, particularly for beginners who are still developing their skill set. Demonstrating not just knowledge but also the ability to apply these rules under varied driving conditions is crucial during a road test.

While unexpected lane changes can indeed lead to a failure, they are often a symptom of a broader issue related to traffic law comprehension and driving proficiency. Similarly, night driving and intersections are specific scenarios that can contribute to failure but are not the primary factors across the board. Overall, mastering the fundamentals of traffic laws and demonstrating practical driving skills is the key focus during road tests, making option B the most comprehensive answer.