What helped immigrants in the 1800s and early 1900s maintain their cultures?

for the united states of america, 1945 to 1964 was a time of high economic growth and general prosperity. it was also a time of confrontation as the capitalist united states and its allies politically opposed the soviet union and other communist countries; the cold war had begun.

explanation:

did you check the study guide?

if i am correct the answer is going to be a) the federal program of reconstruction ended.