There Are Four Lighthouses on the Island of Sand

question 61

Multiple Choice

There are four lighthouses on the island of Sand. If this is the efficient quantity of lighthouses,

• A) the marginal social benefit of the fourth lighthouse equals its marginal social cost.
• B) marginal social benefit minus marginal social cost is at a maximum.
• C) total social benefit is zero.
• D) Both answers A and C are correct.

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Definitions:

Brain Plasticity

The capacity of the nervous system to change its structure and function in response to experience or injury.

Damaged Brain Area

A region of the brain that has been impaired or injured due to trauma, disease, or other conditions.

Parietal Lobes

The region of the brain located behind the frontal lobes, responsible for integrating sensory information, including spatial sense and navigation.

Mathematical Reasoning

The ability to use logical and critical thinking to solve mathematical problems and to understand concepts beyond mere computation.