B, the Treaty of Versailles. The other answers refer to WW2
In the Age of New Imperialism that began in the 1870s, European states established vast empires mainly in Africa, but also in Asia and the Middle East. - https://www.tamaqua.k12.pa.us/cms/lib07/PA01000119/Centricity/Domain/119/TheAgeofImperialism.pdf
Russia or China because they are powerful communist countries who go against the values of the U.S.A .
Technological advances increased profit and productivity
