The passage of the fifteenth amendment in 1869 prompted the formation of two major suffrage organizations because a. it marked a great success for the abolition movement, which many feminists opposed. b. it granted formerly enslaved men the right to vote, while women were still denied this right. c. it put a halt to carrie chapman catt’s “winning plan” and set back the cause of women’s suffrage. d. it granted women the right to vote in western states but not in eastern states.