Answer: In the above excerpt, Susan B Anthony's tone is confident.
Explanation: Susan B Anthony was a suffragist and a women's rights activist. In the above speech, the confidence of her tone is revealed from the fact that she is not asking the government or the society to consider giving voting rights to the women. She is not begging for her right to vote rather she is audaciously telling that she will exercise her right to vote. Also, it is important to note the conviction with which she states that voting is her inherent right and to prove her point she invokes the authority of the US constitution.