Viele proposed that structures be made with locally made concrete mixed with water sources on the island. Residents of Manhattan Island find it easy to grow gardens due to the well-established water map. Central Park continues to flood, which Viele set out to prevent with his map. Builders must analyze potential sites for stability, which affects the building type and zoning options. Which of the following additional resources would validate the Information given in Viele's map?
A. A map of the wetlands on Manhattan island used to observe migratory birds
B. A map of the New York City transit system
C. A map showing population density of New York City by borough in 1865 and 1965
D. A map of Civil War battle sites in and around Manhattan
This map would provide additional information about the wetlands and water sources on Manhattan island, supporting Viele's proposal regarding locally made concrete mixed with water sources.
Therefore, the Correct Answer is A.