If you could give the nation a grade, for example, what would it be, and why?

http://www.americanyawp.com/ only use sources from this textbook please!
During this Unit, we have seen the United States grow from a fractured, traumatized nation in the aftermath of the Civil War, into a major, global power by the early 20th century. How can we explain such a dramatic transformation in such a short period of time? What challenges, tradeoffs, and controversies accompanied America’s dramatic growth in power? Be specific. Overall, how well did the U.S. handle this period of rapid transformation? In other words, what mistakes did the nation make, and how could the nation have done better? If you could give the nation a grade, for example, what would it be, and why? Base your response on the documents we have studied in Unit I and the textbook. No outside sources! Make you sure cite your sources as well, using MLA format (author or title of document, page number, and for the textbook, I just need chapter and section). Remember, your response should be at least 200 words, and posted directly to D2L (not as an attachment). Also, keep your response in the third person (do not use I, me, my, mine, us, we, our(s), you, yours)