How should you respond to a flashing red traffic light?

Answer: D — Complete stop, proceed only when safe

When encountering a flashing red traffic light, it indicates the same requirements as a regular red traffic light. This means you must come to a complete stop, yield the right-of-way, and only proceed when it is safe to do so. Ignoring a flashing red light can lead to accidents or citations, so it is crucial to treat it with the same level of caution as a regular red light. This is why the correct answer is to come to a complete stop and proceed only when safe.