Answer: (A.) to identify the author's supporting evidence that Brown is the true winner of the conflict.
Explanation : the heat of the political moment, Emerson spoke of the public's desire for every detail of Brown's life, which Emerson neatly linked to the many ways we can all relate to "the hero of Harpers Ferry." Emerson spoke to the audience about Brown's life as a farmer, a legacy in his family that dated back to his ancestor on the Mayflower. Emerson named Brown's and his family's birthplaces; knowing Brown's birthplace is yet another way for people to feel a personal connection to him. As he speaks, he frequently refers to his friend as "Captain John Brown." And he describes the man who will be executed in two weeks as an American ideal.
For himself, (Captain John Brown) is so transparent that every man sees right through him. He is the rarest of heroes, a pure idealist with no by-ends of his own, and he is a man to make friends wherever courage and integrity are valued.