What is the primary purpose of a vehicle's mirrors?

Answer: B — To provide a view of the surrounding traffic

The primary purpose of a vehicle's mirrors is to provide a view of the surrounding traffic. Mirrors play a critical role in ensuring that the driver can see other vehicles, pedestrians, and potential hazards in the vicinity of the vehicle. This visibility is essential for safe driving, as it allows the driver to make informed decisions about maneuvers such as changing lanes, merging, and navigating intersections. Having a clear view of surrounding traffic helps reduce the likelihood of accidents and promotes safer driving conditions. While effective mirrors can aid in parking and may help reduce blind spots, their fundamental purpose is to enhance the driver's awareness of their environment, making "providing a view of the surrounding traffic" the most accurate characterization of their primary function.