After world war 2, the communist party led by

Joseph Stalin (assumption)

Explanation: You cant just say "communist party" there were several communist figures and countries with a communist party such as the Communist party in Germany  or Yugoslavian partisans

after the roman empire fell, some of its cultural achievements lasted for some time and others were lost. lost achievements include architecture , coins, and literacy. however, several things remained, such as the language. people may not have spoken this language in every city, but it influenced the languages they did speak. they also created the julian , which was commonly used until the eighteenth century.

b: the establishment clause  

b: socialism