Final answer:
Emergency vehicles responding to a call are authorized to carry a red light visible from the front. This designation is not for private, commercial, or rental vehicles. Rule utilitarianism suggests that in emergencies, like assisting a woman in labor at 4 AM, it may be morally right to break certain traffic laws to maximize overall happiness by ensuring her safety.
Step-by-step explanation:
The class of vehicles that may carry a red light visible from the front is c) Emergency vehicles responding to a call. Private cars, commercial trucks, and rental vehicles are typically not authorized to display a red light visible from the front, as this is a designation for emergency vehicles. Emergency vehicles such as ambulances, fire trucks, and police cars use red lights to signal their urgent need to navigate traffic quickly and safely to respond to emergencies.
In the situation described, where a pregnant woman is about to deliver a baby, it emphasizes the concept of rule utilitarianism (RU). RU suggests that breaking a law, like running a red light, could be considered the morally right action if doing so maximizes utility or overall happiness. In the given situation, the greater utility would be to ensure the safety and health of the pregnant woman by getting her to the hospital as soon as possible, even if that means going through the red light at 4 AM when there is no other traffic around.