Why was Lucy Stone so significant during the Progressive Era?. . A.She founded the weekly feminist newspaper The Women's Journal and lectured for the American Anti-Slavery Society.. . B.She staged pickets outside the Capitol and was jailed in service of the suffrage cause.. . C.She was the first president of the National American Woman's Suffrage Association.. . D.She was an African American journalist who wrote about racism and the separate-but-equal doctrine.