Which of the following statements about urban areas is false?

a. Urban areas have high population densities.

b. The term urban is defined the same way in every country.

c. Many people live closely together in urban areas.

d. Cities, towns, and metropolitan areas are considered urban areas.

I think the correct answer is b. The term is not defined the same way in every country. Urban areas are location characterized by high population density, buildings and infrastructures. However, its definition in every location is not the same. It may refer not only to cities but also to towns and suburbs.