Answer: "The only question left to be settled now is: Are women persons?"
Explanation:
Anthony refers to Webster, Worcester, and Bouvier defining a citizen as a person entitled to vote and hold office, in order to then persuade her audience with the question quoted above.
In her attempt to anticipate selective exposure, she states a question that can only lead to a single conclusion, because there is no doubt that a woman is a person, and therefore should be considered as entitled to vote and hold office.