Which good is MOST likely to be a public good?

Question

Quizplus · Accepted Answer

National defense is most likely to be a public good because it is non-rivalrous (one person's enjoyment of national defense does not prevent others from enjoying it) and non-excludable (it is difficult to prevent individuals from benefiting from national defense). Amazon Prime movie rental and a Six Flags amusement park are both private goods that are rivalrous and excludable, as individuals have to pay to access them. A pair of shoes is also a private good that is rivalrous and excludable, as individuals can only wear one pair of shoes at a time and others can be prevented from using them.

Which Good Is MOST Likely to Be a Public Good