What is a reason to slow down when driving towed vehicles in adverse conditions?

Answer: B — Reduces the risk of swaying

Slowing down when driving towed vehicles in adverse conditions primarily reduces the risk of swaying. Towed vehicles, such as trailers, can be particularly susceptible to aerodynamic forces and road irregularities, which may cause them to sway or fishtail if the vehicle is travelling too fast. Adverse conditions, like rain, snow, or high winds, can exacerbate this instability, making it even more critical to maintain lower speeds for more manageable handling and control. While enhancing fuel efficiency and increasing visibility are also beneficial considerations, they do not directly address the pressing safety issue related to the handling of towed vehicles in challenging conditions. By focusing on the stability of the towed vehicle, slowing down becomes a crucial practice for ensuring safe driving.