Which of the following statements best describes the population of urban areas throughout the world?

A. During the mid-1900s, the population of urban areas around the world decreased significantly, many
people could no longer afford to live in these areas because the cost of living had increased
significantly

B. During the 1960s, approximately 1 billion people lived in urban areas around the world. This number
has increased to approximately 3.5 billion people today.

C. During the late 1800s people flocked to urban areas for more opportunities. However, during the late
1900s, many people did not live in urban areas because these opportunities were no longer
available

D. During the late 1970s, citizens of developing nations moved out of urban areas. It was no longer
necessary for them to live in city centers because the same opportunities were available in rural
areas

E. During the 1960s, approximately 2 billion people lived in urban areas around the world. This number
has not increased significantly, today, only about 2.5 billion people live in urban areas around the
world.