(Table: Externalities from Parks) the Table Externalities from Parks Shows

(Table: Externalities from Parks) The table Externalities from Parks shows the marginal social benefit and the marginal social cost of preserving various amounts of land in a city for a public park.If 1 acre is dedicated to the park, the park is

A) too large.
B) the socially optimum size.
C) too small.
D) the efficient size.