A flashing yellow light means:

Answer: C — Proceed with caution after slowing

A flashing yellow light means you should proceed with caution after slowing down. It does not require you to stop or change lanes, which are options A and B. Speeding up to clear the intersection, as stated in option D, is also not recommended as it can be dangerous. A flashing yellow light is a warning signal, telling you to be alert and proceed with caution.