Susan B. Anthony quotes the preamble of the US Constitution in her speech “On Women's Right to Vote” to

offer evidence that women deserve to vote.
state a reason that women have little freedom.
outline her reasoning about why women should vote.
rebut the counterclaim that women already have freedom.

Susan B. Anthony quotes the preamble of the US Constitution in her speech "On Women's Right to Vote" to offer evidence that women deserve to vote. She emphasizes the phrase "We the people" to argue that women are equally deserving of the rights and privileges afforded to citizens in a democratic society.

Additionally, Anthony quotes the preamble to highlight the lack of freedom that women currently experience. She points out that despite the promise of justice, tranquility, and general welfare in the preamble, women are still denied basic rights and opportunities simply because of their gender.

Moreover, Anthony uses the preamble to outline her reasoning about why women should vote. By referencing the principles of equality and empowerment inherent in the Constitution, she argues that women's participation in the political process is essential for achieving true democracy and ensuring that all voices are heard and represented.

Lastly, Anthony quotes the preamble in order to rebut the counterclaim that women already have freedom. She challenges the notion that women are content with their current status and refutes the idea that they do not need the right to vote because they are already free. By highlighting the disparities between the ideals of the Constitution and the reality of women's lives, Anthony makes a compelling case for why women should be granted the right to participate in the democratic process.