"<span>C. Colonies of imperial nations, such as Congo and India" would be the best option, since most of Europe's colonies during this time were heavily exploited in terms of people and resources. </span>
It was not a battle but a massacre carried out by the 7th cavalry regiment that killed many Indians (a story we all already know) in North Carolina.
Option C, It declared slaves to be in bondage even in free states or territories, is the right answer.
The supreme court of the United States on March 6, 1857, asserted that a Slave ( Dred Scott) who was living in the free state and territory of the United States was not allowed to his freedom and that the African -Americans were not and could never be subject of the U.S. Citizenship. Supreme Court also declared that Congress had no power to exclude slavery from the territories of U.S. This became Abolitionists (the White Northerners, who opposed Slavery) outraged from the decision made by the Supreme Court.
He was an industrialist and philanthropist. He got his fortune in the steel industry by creating the Carnegie Steel Company and he revolutionized the way steel is produced in the U.S.
Peter mentions thinking about converting to Christianity after the war, this will make his life easier. Anne thinks Peter has an inferiority complex because of this.