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A street light is non-rival because one person benefiting from it:
ALeaves as much for others
BUses it up for others
CBlocks others entirely
DDoubles the total cost
Answer & Solution
Correct answer: A. Leaves as much for others
1. Non-rival describes what happens to the good when someone consumes it.
2. Radio stations, tornado sirens, light houses, and street lights are all nonrivalrous and nonexclusionary.
3. The light one pedestrian walks under is still there for the next.
4. A private good would be diminished by that first use.
_Source: OpenStax Principles of Microeconomics for AP(R) Courses 2e (CC BY 4.0), Ch 13 'Positive Externalities and Public Goods', sections 13.1-13.4_
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