Read the excerpt from The Souls of Black Folk by W. E. B. Du Bois. The black men of America have a duty to perform, a duty stern and delicate,—a forward movement to oppose a part of the work of their greatest leader. So far as Mr. Washington preaches Thrift, Patience, and Industrial Training for the masses, we must hold up his hands and strive with him, rejoicing in his honors and glorying in the strength of this Joshua called of God and of man to lead the headless host. But so far as Mr. Washington apologizes for injustice, North or South, does not rightly value the privilege and duty of voting, belittles the emasculating effects of caste distinctions, and opposes the higher training and ambition of our brighter minds,—so far as he, the South, or the Nation, does this,—we must unceasingly and firmly oppose them. Which statement best explains why this argument is valid?