During what time is it particularly essential to pay attention to other drivers' speeds?

Answer: C — During rush hour

During rush hour, traffic typically experiences increased congestion and a higher volume of vehicles on the road. This results in varied speeds among drivers as some may be trying to navigate through the traffic quickly, while others may be more cautious or even frustrated. It's important to pay attention to other drivers' speeds in this context because erratic behavior, sudden stops, or lane changes can lead to accidents. Furthermore, understanding the speed of surrounding traffic allows for safer merging and lane changes, as well as maintaining a safe following distance. This awareness helps to anticipate potential hazards and contributes to overall road safety during peak travel times when visibility and space can become limited.