What does a yellow flashing signal indicate?

Answer: C — That you may proceed only with caution.

A yellow flashing signal indicates that you may proceed with caution. This signal serves as a warning to drivers that there may be conditions requiring alertness nearby, such as pedestrians crossing, an intersection, or other potential hazards. When you see a yellow flashing light, it is important to reduce your speed and be vigilant about your surroundings. This caution allows you to navigate through situations where normal driving may need to be adjusted for safety. In contrast, other signals and signs provide different instructions; for instance, a solid yellow light typically indicates that a red light is imminent and a stop is necessary. Therefore, understanding the specific function of a yellow flashing signal is crucial for safe driving practices.