When driving on a road without a center line, what must drivers do?

Answer: B — Give at least half the road to oncoming traffic

When driving on a road without a center line, the expectation is for drivers to give at least half of the road to oncoming traffic. This practice enhances safety by ensuring that both vehicles have adequate space to pass without risking a collision. On such roads, which may be narrower and lack clear markings, maintaining this space is especially crucial since there is no designated lane for each direction of travel. By doing so, drivers can prevent dangerous situations that might arise from close encounters with oncoming vehicles. The other choices suggest actions that do not effectively address the inherent risks associated with driving without a center line. Using only a quarter of the road or driving at a reduced speed do not specifically address the need to maintain safe distances from vehicles traveling in the opposite direction. While staying as far right as possible is generally good practice, it must be balanced with the requirement to provide adequate space for oncoming traffic, making the second option the most appropriate and safety-oriented choice.