Final answer:
The answer to the question is generally True; drivers must yield to pedestrians in both marked and unmarked crosswalks to ensure pedestrian safety and comply with traffic laws.
Step-by-step explanation:
The question 'Drivers must yield to pedestrians in an unmarked crosswalk: a. True b. False' is a matter related to traffic laws and pedestrian safety. Generally, the answer is True: drivers are indeed required to yield to pedestrians in both marked and unmarked crosswalks. This is to ensure pedestrian safety, especially in busy areas such as near a campus where students are coming and going. Not yielding could lead to accidents and is often against traffic regulations. The specifics can vary by jurisdiction, but the underlying principle of pedestrian right-of-way is commonly enforced to prevent accidents and ensure safety at intersections. Additionally, the implementation of traffic signals is a common measure taken to further protect pedestrians by regulating the flow of vehicles and providing designated crossing times.