The excerpt "I have ploughed and planted and gathered into barns, and no man could head me!" best refutes the anti-suffragist idea that women were too fragile to handle the right to vote. So, it's D.
The central idea of "Ain't I a Woman" is to influence the audience that granting women the privilege to vote is common sense. It also signifies that equality means everyone is equal.
Therefore, the correct option for this question is D.
To learn more about "Ain't I a Woman", refer to the link:
https://brainly.com/question/4177978
#SPJ1