_________ usually was regarded as the most leading spirit of American Transcendentalist Movement.
A. Henry David Thoreau
B. Ralph Waldo Emerson
C. Nathaniel Hawthorne
D. Walt Whitman
Henry David Thoreau's work ______ , has been regarded as a masterpiece of New England Transcendentalism.
A. Daisy Miller
B. Walden
C. Nature
D. On the Duty of Civil Disobedience