Final answer:
You must stop your vehicle at stop signs, red lights, and when ordered by traffic officers, so the answer is 'All of the above.' Exceptions may apply in emergencies like transporting a pregnant woman in labor to the hospital. Traffic signals also improve pedestrian safety and reduce accidents.
Step-by-step explanation:
As a general rule, you are required to stop your vehicle at an intersection with a stop sign, where there is a red light, and when a traffic officer orders you to stop. This means the correct answer to the question is 4) All of the above. However, there might be exceptional circumstances, such as a medical emergency, that could justify breaking these rules. For instance, if you are driving a pregnant woman to the hospital at 4 am and she is about to give birth, going through a red light might be considered morally acceptable if it is safe to do so and would result in greater utility by ensuring the safety of the mother and unborn child.
Moreover, there are other reasons highlighted for the necessity of stopping at traffic signals, such as enhancing pedestrian safety and reducing the risk of traffic accidents. A traffic signal helps manage the flow of vehicles and provides safer crossing points for pedestrians, thereby preventing accidents and potentially saving lives.