Which of the following developments of the 1920s decreased regional and cultural differences in America? A. the "whispering campaign" of 1928 B. the Harlem Renaissance C. difficulty in enforcing prohibition D. the founding of national radio networks like NBC

Most goods that came into ancient rome traveled by what?

How did the invention of the cotton gin affect slave labor in the united states? a. there was a forced migration of slaves from the south to the north. b. slave-owning cotton planters were gradually forced to sell their plantations. c. more slaves were purchased to work on cotton plantations in the south. d. the reduced need for labor on cotton plantations led to a decline in slavery. e. slaves were moved from cotton plantations to sugar plantations.

What governments allow the use of the initiative, the referendum, and the recall? a. all state governments and the federal government b. some state governments and the federal government c. some state governments d. all state governments