What does a traffic signal display with both red and yellow lights mean?

Answer: B — The light will change to green soon; prepare to stop

When a traffic signal shows both red and yellow lights, it serves as an important signal for drivers. This combination indicates that the signal will soon change to green, signaling drivers to prepare to stop if they haven't already done so. The red light indicates that vehicles must stop, and the yellow light cautions drivers about the imminent change, emphasizing the need to be prepared to halt. This signaling mechanism is crucial for maintaining safety at intersections, as it allows time for drivers to react appropriately to the changes in the traffic signal. It helps prevent accidents that could occur if drivers were to ignore the warning given by the yellow light and proceed through the intersection without stopping when facing a red light. Understanding these signals is essential for safe driving practices and compliance with traffic laws.