What does a yellow traffic light indicate?

Answer: B — Prepare to stop; the light is about to turn red

A yellow traffic light serves as a warning to drivers, indicating that the light is about to change to red. This signal advises drivers to prepare to stop safely and to ensure that they do not enter the intersection unless they are already too close to stop in a safe manner. The intent is to promote caution and to prevent accidents as vehicles are transitioning through intersections. This understanding underscores the importance of being attentive to traffic signals and adjusting driving behavior accordingly. While options that suggest speeding up to cross or proceeding without caution might overlook the potential dangers, recognizing the yellow light as a cue to prepare for a stop aligns with safe driving practices. Similarly, identifying a malfunctioning signal is not related to the standard meaning of a yellow light, further emphasizing the accuracy of the correct answer.