(D) Upgrading formerly Communist segments of the economy
Probably the most important change that happened at the time was that C - Women worked jobs that had ben held almost exclusively by men.
Due to the fact that the majority of men, or at least a good portion of them, were on the battlefield in Europe, women had to take over the role in certain key areas that were necessary for the victory of the US.
The highest court of Athens, before whom Paul debated, was known as the Areopagus :)
Communicate with other peope
The Entente-UK, Canada, Australia, British Malaya, British Raj (India) ect
The central powers- Germany, Austria-Hungary ect