Which of the following was a founder of the National Womans Party?

Margaret Sanger was a prominent activist known for her work in birth control and reproductive rights, but she was not a founder of the National Woman's Party. Her focus was primarily on women's health and family planning, which distinguished her efforts from suffrage activism.

Carry Nation was an influential temperance activist, famed for her radical methods of promoting prohibition. While she was involved in social reform, her work was not directly tied to the women's suffrage movement, and she did not play a role in founding the National Woman's Party.

Jane Addams was a social reformer and the co-founder of Hull House, focusing on social justice and the welfare of immigrants. Although she supported women's suffrage, she was not involved in the founding of the National Woman's Party and had a broader social reform agenda.

Clara Barton is best known for founding the American Red Cross and her humanitarian work during the Civil War. While she contributed greatly to social causes, she did not participate in founding the National Woman's Party or the suffrage movement.