Which of these would be considered a public good?

Question

Quizplus · Accepted Answer

National defense is considered a public good because it benefits the entire population and is non-rivalrous, meaning that one person's consumption of it does not diminish its availability to others. A football stadium would only benefit those who attend events there, making it non-public. A toll bridge is considered a quasi-public good because it is excludable, meaning people can be prevented from using it unless they pay, but it is still non-rivalrous. A private office building is clearly not a public good.

Which of These Would Be Considered a Public Good