What does a flashing red light mean at an intersection?

Answer: B — Come to a complete stop

A flashing red light at an intersection indicates that drivers must come to a complete stop. This signal functions similarly to a stop sign; it requires drivers to halt their vehicles before proceeding. After stopping, drivers should ensure the intersection is clear of other vehicles and pedestrians before continuing through the intersection. This rule is crucial for ensuring safety, as it gives all road users the opportunity to assess the situation and avoid potential collisions. Following this signal helps maintain order at busy intersections and reduces accidents caused by ignoring the warning to stop. It's important to remember this rule, as misinterpreting the flashing red light could lead to dangerous situations.