One of the greatest breakthroughs that the Native Americans achieved during the start of the second half of 20th century was that their respective lands were brought back to them. In addition, the federal government had started to provide financial aids to the tribal groups with regards to their agricultural lives.
I think it might be answer A
It was the refinement of the Bessemer process, first used in the United States in the 1860s, that allowed for the major advance in skyscraper construction. As steel is stronger and lighter in weight than iron, the use of a steel frame made possible the construction of truly tall buildings.
Elizabeth Cady Stanton was one of the main leaders of the women's rights movement in the United States. She and Susan B. Anthony founded the Women's Suffrage Association in 1869, dedicated in giving women the right to vote. She was also active in the Abolitionist movement.
DURING RECONSTRUCTION, African Americans had the right to vote! Yay! (B is incorrect.) Due to the sheer numbers of African American voters, African Americans often won political office throughout the South--a big change from before! A is correct!! Keep in mind that while African Americans were elected in the North, the question asks about African Americans in the SOUTH (C is incorrect). Also, minimum wage didn't exist in the United States at the time (D is incorrect).
Answer: A