Which excerpt from "ain't i a woman? " best refutes the anti-suffragist idea that women were too fragile to handle the right to vote?
then that little man in black there, he says women can’t have as much rights as men, ’cause christ wasn’t a woman!
that man over there says that women need to be into carriages, and lifted over ditches, and to have the best place everywhere. well, children, where there is so much racket there must be something out of kilter.
i have ploughed and planted, and gathered into barns, and no man could head me!

The correct answer is:

I have ploughed and planted, and gathered into barns, and no man could head me!

Explanation:

Ain't I a Woman was a speech delivered by Sojourner Truth in 1851 at the Women's Convention in Akron, Ohio; Sojourner was an African American woman, former slave and activist of the women's suffrage and the African American rights. In her speech Sojourner reflected the reality of the society where men thought women were fragile and were not capable of voting, and the reality that women lived where they proved their strength in the everyday life duties. The excerpt that best refutes the anti-suffragist idea is "I have ploughed and planted, and gathered into barns, and no man could head me!" because she explains that women are capable of doing the hard work without help.

i think the answer is b.