Answer:
Many people were unhappy with their governments.
Explanation:
The factor that made it easy for communism to spread in Eastern Europe is because "Many people were unhappy with their governments."
This is evident in the fact that after world war 1, Stalin used the power of propaganda through radio to popularize the defects of the governments in eastern Europe.
He also secretly recruit policemen to spread Communism in the region. A good example was how he recruited police forces that were unhappy with the government in Poland in 1939.
1896: The idea of striking the Yukon Gold Rush made 100,000 of all different people abandon their homes and embark on an extended life-threatening journey across treacherous icy valleys and rocky terrain.
The Dead Horse Trail: 3,000 horses lay dead on White Pass
Robots, they are the technology used to dismantle bombs.
Hope that helps :)