Read the following excerpt from "Blessings of Liberty and Education" by Frederick Douglass. Then, answer the question that follows. Thirty years ago neither poet, priest nor prophet, could have foretold the vast and wonderful changes which have taken place in the opinions of the American people on this subject since the war. The North has changed, and the South has changed, and we have all changed, and all changed for the better. What is the effect of the use of parallel structure in the sentence in bold? It creates a hopeless tone by repeated phrases with negative connotations. It elaborates on how historians were able to predict the future after the abolition of slavery. It emphasizes the transformation of the United States after the abolition of slavery. It defines the exact changes that have taken place in the American people.