The conditions being so bad? i might be wrong
The conquest of new lands allowed Romans to "C. Trade good theypreviously did not have," since the new lands offered more raw and cultivated materials.
B) The united states and the soviet union became the world's two most powerful states, leading to a global struggle between democracy and communism
After WW2 ended, the cold war begun, which was the race against the democratic powers the communist powers. This resulted in many proxy wars and was one of the biggest outcomes of WW2.
I hope this helps! :)
Because of the weakness of non-states (ones that werent official, just groups of people who called themselves states), and European powers had strong econimies and a well organized government. Hope this was useful :P
