Seeing how the Great Depression was long gone since 1939, A would be incorrect, and World War Two started in 1939(US entered the war in 1941) so B would make no sense either. The integration problem happened in the 60's so that would be incorrect as well, using the process of elimination the correct answer would be D) The United States and the Soviet Union had been involved in the Cold War for about four decades.
Answer: Serfdom
Explanation: The Russian Empire practiced serfdom—a form of feudalism in which landless peasants were forced to serve the land-owning nobility—well into the nineteenth century.
1. The city was invaded by Alexander the Great during 331 B.C, as a result, he overtook and took most of the people as slaves.
2. As the city was very old already during its time, people stopped giving importance and the civilisation s l o w l y started to fall apart. Just like the Romans. Even if they had a wealth of knowledge.
3. It became under Persian rule, The Greeks fir the last 3 centuries before it vanished.
4. The city therefore became derelict. All the statues and 'amazing' buildings which once were, all the building materials were stolen and cannibalised by working-class peasants.
Answer:
I think its John Milledge