Which of the following best supports the idea that Turner took a positive view of the effects of the frontier on American History? A. The continual recurrence of these areas of paper-money agitation is another evidence that the frontier can be isolated and studied as a factor in American history of the highest importance
B. And now, four centuries from the discovery of America, at the end of a hundred years of life under the Constitution, the frontier has gone, and with its going has closed the first period of American History
C. He would be a rash prophet who should assert that the expansive character of American life has now entirely ceased
D. The result is that to the frontier the American intellect owes its striking characteristic