Final answer:
Section 8 housing refers to government-assisted housing for low-income families. Price ceilings on housing can reduce quality and availability for renters, serving as a reminder of the economic principle of opportunity cost. The option (A) is correct.
Step-by-step explanation:
Section 8 housing refers to government-assisted housing for low-income families. It is a program provided by the federal government to help families with low incomes afford decent and safe housing.
The program provides housing vouchers to eligible families, which can be used to rent a house or apartment from a private landlord. Gentrification has played a role in reviving cities but also comes with complexities related to urban renewal and displacement. Therefore, option (A) is correct.