Final answer:
A flashing red light at an intersection requires drivers to stop and proceed with caution when the way is clear. The correct option is C.
Step-by-step explanation:
A flashing red light at an intersection means a driver must stop and proceed with caution when it is clear. This is akin to a stop sign, where vehicles must come to a full stop and may only continue when they can safely enter the intersection without conflicting with other traffic.
It is important to always slow down and be prepared to stop when approaching intersections to enhance pedestrian safety, and respect the posted speed limit. Critical situations, such as a medical emergency involving a pregnant woman, may present ethical dilemmas regarding traffic rules.
However, the legal expectation is to observe the flashing red light as a stop signal.