What does a flashing yellow light at a traffic signal indicate?

Answer: C — Drive with caution in approaching and moving through the intersection

A flashing yellow light at a traffic signal indicates that drivers should proceed through the intersection with caution. This option is incorrect because stopping immediately is not necessary unless other traffic signals are present. Option B is incorrect because although drivers should always be cautious of pedestrians, a flashing yellow light specifically indicates a warning for drivers. Option D is incorrect because speeding up to clear the intersection is not safe or recommended in this situation. Overall, the best course of action for a driver when encountering a flashing yellow light is to proceed with caution and be prepared to yield to other vehicles if necessary.