How are people adversely affected by the growing size of the human populations in cities?
A - They face a lack of adequate housing, insufficient sewage systems, and an increased abundance of cars.
B - They face an increased abundance of cars, insufficient electrical systems, and a lack of housing.
C - They face a lack of adequate housing, insufficient sewage systems, and a decreased availability of cars.
D - They face an increased abundance of cars, a lack of adequate housing, and insufficient transportation systems.
Answer: A - They face a lack of adequate housing, insufficient sewage systems, and an increased abundance of cars.