At an unmarked crosswalk, who has the right-of-way?

Answer: B — The pedestrian

In an unmarked crosswalk, the pedestrian has the right-of-way. This is because unmarked crosswalks, also known as "unsignalized crosswalks", do not have traffic signals or stop signs regulating the flow of traffic. Therefore, it is the responsibility of the driver to yield to the pedestrian. Options A, C, and D are incorrect because they suggest that the vehicles have the right-of-way over the pedestrian, which is not the case in an unmarked crosswalk. While it is important for drivers to be aware of and yield to pedestrians in all situations, it is especially critical to do so at an unmarked crosswalk where the pedestrian does not have the protection of traffic signals or signage.