Which of the following would be the best way to describe the US GOVT's approach to dealing with Native Americans on the frontier following the Civil War?

Which of these statements best describes the ambiguity in this excerpt

The establishment of columbia as the state capital was important because a) it was located in the heart of the upcountry. b) it was located in the heart of the low-country. c) it was already established as a vital industrial center. d) it represented a compromise location central to most citizens.

Which statement describes the middle passage