Answer:
Europeans explored and claimed that more and more land was there. They had to make relations with people who were already in the Americas and try to find a way to conquer them and claim that land theirs.
hope this helps and feel free to add brainiest
Some examples of this were the Fugitive Slave Act, Preston Brooks's attack on Charles Sumner, and the Dred Scott decision (the part of it which said that African Americans could never be citizens). None of these events tangibly hurt the North or the South.
The Rocky mountains provided the greatest obstacle to railroad expansion
Answer:
A. Chiang Kai-shek and the nationalists turned against the communists and killed hundreds of them.
