What does a yellow traffic light indicate?

Answer: B — Prepare to stop; the light will change to red

A yellow traffic light serves as a warning signal that the traffic light is about to change to red. This means drivers should prepare to stop and not attempt to enter the intersection unless they are already too close to safely stop. It is an important reminder to pay attention to changing signals and adjust driving behavior accordingly. While it is crucial for drivers to proceed with caution when the yellow light is activated, the primary action required is to be ready to stop. Understanding this helps maintain safety for all road users, as running a red light can result in serious accidents.