A flashing yellow traffic light means you should?

Answer: B — Proceed with caution and slow down

A flashing yellow traffic light indicates that you should use caution, as it is a warning of a potential hazard ahead. This option is the safest approach when approaching a flashing yellow light. Option A, stopping immediately, is incorrect because the light is not indicating a full stop, but rather caution. Option C, speeding up, should be avoided as it goes against maintaining safety and following traffic rules and regulations. Option D, yielding to oncoming traffic, is not entirely correct because you only need to yield if the road is not clear and it is safe to do so.