D. cities offer a wealth of opportunities for citizens, including jobs, access, education and healthcare
The similarities between the five great revolutions of the modern world – the English Revolution (1649), American Revolution (1776), French Revolution (1789), Russian Revolution (1917) and Chinese Revolution (1949). hope this maybe helped :)
Containment, this meant that the US knew it would not be able to turn a communist country to a democracy so they just tried to limit the number of countries in the USSR's sphere of influence.
A resposta é a alternativa B - Aumento da população urbana