To combat Reconstruction reforms, some Southerners organized
O white supremacy groups
O the Freedman's Bureau
O a new Republican Party
O a new Democratic Party.

the second significant cause of the great migration was the desire of black southerners to escape segregation, known euphemistically as jim crow. rural african american southerners believed that segregation - and racism and prejudice against blacks - was significantly less intense in the north.

explanation:

an oligopoly is a term used to clarify the structure of a particular market, industry, or organization. a market is considered oligopolistic or amazingly focused when it is shared between a few companies.

the answer is a. harriet tubman was a nurse on the battlefield.