Answer :

The answer is E Plato users
LREH

Answer:

Economic abundance, cold war, civil rights and rock and Roll.

Explanation:

There were several developments in the United States during 1850s. This included economic, political, and cultural transitions in the society. Post war U.S. Society was marked by economic abundance, but the emergence of the cold war led to loyalty checks for millions of Americans  by the other hands the civil rights activism and the popularity of Rock Music also defined the decade.