Question

tb mc qu. 05-05 the two main characteristics of... the two main characteristics of a public good are multiple choice production at constant marginal cost and rising demand. nonrivalry and large negative externalities. nonexcludability and production at rising marginal cost. nonrivalry and nonexcludability.

Explanation:

Public goods are defined by nonrivalry (one person's consumption doesn't reduce availability for others) and nonexcludability (it's impossible or very costly to exclude others from consuming). These are the key characteristics distinguishing them from private goods.

Answer:

D. nonrivalry and nonexcludability