What does a yellow traffic light mean?

Answer: C — Warning - Slow Down

A yellow traffic light typically means to slow down and prepare to stop if the light continues to stay yellow. Option A is incorrect because stopping immediately at a yellow light can be dangerous and may cause a rear-end collision. Option B is also incorrect because a yellow light is not a sign to go, as this can also lead to accidents. Option D is incorrect because it disregards the main purpose of a yellow light, which is to warn drivers to slow down and prepare to stop at the upcoming red light. Therefore, option C is the most appropriate and safe course of action to take when encountering a yellow traffic light.