Which statement is true regarding the concept of 'unavoidable circumstances' in driving?

The statement regarding 'unavoidable circumstances' being external factors beyond a driver's control is accurate because it captures the essence of what such circumstances entail. Unavoidable circumstances can arise from a variety of scenarios including unexpected road conditions, mechanical failures, or sudden actions by other drivers or pedestrians that a driver cannot foresee or prevent.

These circumstances are not predictable; instead, they can happen suddenly and without warning, making them difficult for drivers to anticipate. This aspect differentiates them from predictable events, which drivers can plan for. While some drivers may occasionally disregard these circumstances or fail to adjust their driving in light of them, it does not define the concept of unavoidable circumstances. They are not confined solely to adverse weather situations, as they can occur in various conditions and contexts. Thus, the focus on external factors truly conveys the important point of this concept within defensive driving practices.