What does it mean if you see a yellow traffic light?

A yellow traffic light signals that the light is about to change to red. This warning indicates that drivers should prepare to stop if it is safe to do so. The purpose of the yellow light is to alert motorists that they need to reduce speed and be aware of the upcoming change in the traffic signal. This action helps prevent accidents and ensures that vehicles are not caught in the intersection when the light turns red.

It's important to note that while B, which suggests proceeding with caution, is relevant in terms of being alert, the primary directive of a yellow light is to indicate the imminent change to red, making stopping the more critical action. The other choices suggest actions that do not align with the rules of the road regarding traffic signals and could lead to unsafe driving conditions.