Which of the following displays these two characteristics: nonrivalry and nonexcludability in consumption?

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A public good exhibits nonrivalry in consumption, meaning consumption of the good by one individual does not reduce the amount available for others. It also exhibits nonexcludability, meaning it is difficult or impossible to prevent individuals from consuming the good once it is produced. Private goods have excludability, meaning individuals can be prevented from consuming the good if they do not pay for it, and are rivalrous in consumption, meaning consumption by one individual reduces the amount available for others. Quasi-public goods have some characteristics of both public and private goods, while common resources are rivalrous in consumption but nonexcludable.

Which of the Following Displays These Two Characteristics: Nonrivalry and Nonexcludability