Everyone in the Neighborhood Has Been Complaining About the Deteriorating

Multiple Choice

Everyone in the neighborhood has been complaining about the deteriorating condition of the park, but nobody has cleaned it up. Why not?

A) There is an excess demand for parks in the neighborhood.
B) There is an excess supply of parks in the neighborhood.
C) The social benefit of cleaning the park exceeds the social cost of cleaning it.
D) No single person's benefit from cleaning the park exceeds that person's cost of cleaning it.