C. tolerance should be the answer
Answer:
After the Civil War, with the protection of the Thirteenth, Fourteenth, and Fifteenth Amendments to the Constitution and the Civil Rights Act of 1866, African Americans enjoyed a period when they were allowed to vote, actively participate in the political process, acquire the land of former owners, seek their own
Explanation:
Eli Whitney is credited with putting the concept of using mass-produced interchangeable parts into practice. He came up with this concept during a war, when he used these parts to create guns.
Harriet Tubman was an escaped enslaved woman who became a “conductor” on the Underground Railroad, leading enslaved people to freedom before the Civil War, all while carrying a bounty on her head. But she was also a nurse, a Union spy and a women's suffrage supporter.