What does a red traffic signal indicate?

Answer: B — Stop

A red traffic signal indicates that drivers must come to a complete stop at the intersection before the crosswalk or at the stop line if there is one. This signal is crucial for maintaining safety on the road, as it allows pedestrians to cross safely and other vehicles to move without risk of collision. Failing to stop at a red light can lead to accidents, traffic violations, and penalties. In this context, the other choices do not provide the correct action for a red traffic signal. Yielding suggests giving way to other traffic, proceeding with caution implies that driving is permissible under certain conditions, and slowing down does not align with the requirement to stop fully. Understanding the meaning of traffic signals is essential for safe driving practices and compliance with road regulations.