In more developed countries, suburban developments during the mid-20th century focused on
moderate single-family homes on small lots. In contrast, in the latter half of the 20th century, many
suburban areas were developed to contain large lots with single-family homes. Which of the
following explains the importance of this change in the pattern of development?
a. Gentrification resulted from the reinvestment into existing urban residential real estate
b. Brownfields resulted from the deindustrialization of factories, warehouses, ports, and rail yards
Smart growth resulted from the planning of transportation networks dependent on trains and
buses
d. New Urbanism resulted from the zoning of mixed-use districts dependent on walkways and
bikeways
Urban sprawl resulted from the expansion of transportation networks dependent on cars