Motorists should do what to exercise caution?

To exercise caution while driving, it is important to decrease speed, increase the following distance, and activate headlights. Slowing down allows drivers to react more effectively to changing conditions, such as unexpected obstacles, adverse weather, or other drivers' actions. Increasing the following distance provides a greater buffer zone, giving more time to respond if the vehicle in front suddenly stops or slows down.

Activating headlights is particularly crucial in low visibility conditions, like fog, rain, or nighttime driving, as it enhances visibility for both the driver and other road users. This combination of actions emphasizes a proactive approach to safety, ensuring that the driver can navigate safely through various driving situations.

The other choices do not support the goal of exercising caution as effectively. For example, driving faster contradicts the principle of caution, while using turn signals frequently, though important for communication, does not directly address the need for increased safety measures in uncertain driving conditions. Staying in the middle of the lane is desirable for lane discipline but does not encompass the essential safety strategies that careful driving requires.