One way in which Frederick Douglass, William Lloyd Garrison, and Harriet Tubman are similar is that they all supported the ... a. passage of Black Codes
b. abolitionist movement
c. nullification theory of States rights
d. plantation system in the South

b, abolitionist movement

Explanation:

Frederick Douglass was an escaped slave and a prominent activist for the abolitionist movement; William Lloyd Garrison was a prominent American abolitionist, journalist, suffragist, and social reformer; Harriet Tubman was an escaped slave who helped many other slaves escape on the underground railroad and was a supporter of the abolitionist movement all her life.

answer; philip morin freneau

i think it's a)sparta