What is one major problem that has resulted from population growth in the 20th and 21st centuries?
O A. Urban populations have fallen as people move to rural areas.
B. Many countries remain technologically underdeveloped.
O C. Forced migrations have become more common than ever before.
D. Diseases can spread more easily because of urban overcrowding.

Which term do historians use to describe the personal preferences that people have that affect their interpretation of events

Examine this list of events that took place in china during the 20th century. which event or events could possibly have been a cause of the great leap forward? a. i only b. i, iii, and iv c. i and iii d. iii and iv

Which of the following describes an effect of world war ll on the united states economy a. automobile companies produced a record number of cars b. many factories had to expand to produce military equipment c. the airplane industry suffered as the allies began using airplanes in combat d.cities with shipyards declined because so many ships had been sent overseas.