According to W. E.B. Du Bois The study of the Negro Problems, what was the underlying cause of the social problems that affected African American at the end of the 19th century?

the answer is d. give brainliest if right.

ps is this 7th grade civics?

whose power in the senate is equal to the power of the speaker of the house?

the answer to your question is ( syngman rhee) have a great day

to reform the distraught soviet union, the democratization of the communist party was promoted through party secretary mikhail gorbachev's policies of “perestroika” and “glasnost.” perestroika refers to the reconstruction of the political and economic system established by the communist party.