What Characteristic Defines a Megacity

Multiple Choice

What characteristic defines a megacity?

A) a city that has more than 10 million inhabitants
B) a city that grows by approximately 1,000 new immigrants each day from overpopulated rural areas
C) a cluster of small or medium-sized cities, each with population of less than 1 million
D) a suburban sprawl of developed suburbs
E) a city that has over 100 high-rise buildings