Answer:
A. Serbia,
Why: It achieved independence in 1867.
Margaret Sanger, she was a writer, women's rights activist and a nurse
Answer: The congress of vienna
Explanation:
Answer:
Frederick Jackson Turner was an early twentieth-century American historian. He advocated for multidisciplinary and quantitative approaches, frequently focusing on the Midwest. His thoughts constituted the Frontier Thesis, and he is most known for his essay "The Significance of the Frontier in American History."