Question

Former slaves who contributed to the antislavery cause were

a. Horace Mann, Margaret Fuller, and Henry David Thoreau.
b. Josiah Quincy, Angelina Grimké, and Charles Finney.
C. Lucretia Mott, Walt Whitman, and Elizabeth Cady Stanton.
d. Frederick Douglass, Sojourner Truth, and Harriet Tubman.

Answer 1

Former slaves who contributed to the antislavery cause were Frederick Douglass, Sojourner Truth, and Harriet Tubman.

Step-by-step explanation:

Im sorry it took so long... Hope this helps!