It is believed that they crossed the land bridge that used to lay between Alaska and Asia but that melted many thousands of years ago.
Answer:
A) William Penn paid the Native Americans for the land Quakers settled
Explanation:
Dred Scott decision, formally Dred Scott v. John F.A. Sandford, legal case in which the U.S. Supreme Court on March 6, 1857, ruled that a slave, who had resided in a free state and territory was not thereby entitled to his freedom; that African Americans were not and could never be citizens of the United States; and that the Missouri Compromise , which had declared free all territories west of Missouri and north of latitude 36°30′, was unconstitutional. If you need more informaion go to https://www.britannica.com/event/Dred-Scott-decision and it should help out alot .