The statement is TRUE.
The concentration of the population in cities is referred to as urbanization.
It contrasts to rural populations which live outside cities in villages. Before the industrial revolution, most of the world's population lived in rural areas, close to farm land which was their primary source of sustenance.
With the industrial revolution and the introduction of mass manufacturing numerous new sectors and professional jobs were created including accountancy, technicians, teachers etc.
This gave rise to small towns emerging into larger cities having a very different social structure to that found in villages.
With time, more and more people moved to cities, which is known as the urbanization of a population.
The Doctrine that eased Cold War tensions was the Nixon doctrine
I’m not certain but I think it’s E because it was a result of the Great Depression
