The purchase of Alaska in 1867 marked the end of Russian efforts to expand trade and settlements to the Pacific coast of North America, and became an important step in the United States rise as a great power in the Asia-Pacific region.
I think you forgot to add some detail but based on my research, the correct answer to this question is "A Bill of Rights was added to the Constitution." Thank you for posting your question. I hope that this answer helped you. Let me know if you need more help.
