What can sudden or jerky movements when stopping indicate?

Sudden or jerky movements when stopping often indicate that a driver may not be fully in control of the vehicle or may not be employing smooth braking techniques. This kind of driving behavior suggests that the driver is possibly not anticipating stops effectively or applying the brakes in a gradual manner. Effective stopping requires a driver to assess speed and distance to come to a smooth halt, and any abrupt movements can signal a lack of practice or experience in achieving that skill.

In contrast to the other options, which imply either a higher level of skill or understanding, the answer notes that while the driver may have a basic grasp of driving principles (hence the classification as "fair"), their execution leaves room for improvement. This distinction is crucial as it reflects a level of proficiency that is not yet fully developed. Maintaining control and ensuring smooth transitions are markers of good driving skills, which is not evidenced by sudden movements.