Why should drivers exercise caution while driving on a narrow bridge?

Answer: C — There may be oncoming traffic

Drivers should exercise caution while driving on a narrow bridge primarily due to the potential presence of oncoming traffic. Narrow bridges are typically designed to accommodate only one lane of traffic, which means drivers may encounter vehicles traveling in the opposite direction. This situation requires heightened awareness and careful maneuvering to ensure that all vehicles can pass safely, as there may not be enough space for two vehicles side by side. In this context, it's important for motorists to be attentive to their surroundings, maintain a safe speed, and be prepared to yield if necessary. The presence of oncoming vehicles can create tight situations where poor judgment or lack of attention could lead to dangerous collisions. Other aspects, such as visibility issues on narrow bridges or the condition of the road surface, can also contribute to hazards. However, the most pressing concern remains the need to navigate potential conflicts with oncoming traffic, making this the critical reason to exercise extra caution when approaching and traversing narrow bridges.