What does a solid red traffic light indicate?

Answer: B — Stop, and do not proceed until the light turns green

A solid red traffic light indicates that drivers must come to a complete stop and remain stopped until the light changes to green. This is a critical traffic control signal designed to ensure safety at intersections. The expectation is that all vehicles will pause and not move forward, allowing other vehicles and pedestrians to proceed safely through the intersection. While options that suggest proceeding with caution, slowing down, or yielding to pedestrians may seem reasonable in certain driving contexts, they do not align with the specific instruction of a solid red light. Drivers should take the red light seriously as a directive to halt, ensuring they do not inadvertently endanger themselves or others by misinterpreting what action is required in this scenario.