Which of the following was a founder of the National Woman's Party?

Margaret Sanger was a prominent birth control activist and the founder of the American Birth Control League, now known as Planned Parenthood. While she significantly contributed to women’s rights, particularly in reproductive health, she was not a founder of the National Woman's Party and focused more on issues related to family planning.

Carry Nation was an ardent temperance advocate known for her radical approach of attacking bars and saloons with a hatchet. Her activism was primarily centered around the prohibition movement rather than women’s suffrage, making her an important figure in a different, but related, social reform movement.

Jane Addams was a social reformer and co-founder of Hull House, advocating for social justice, peace, and women's rights. Although she was influential in many social movements, she was not involved in founding the National Woman's Party and focused more on social work and community activism.

Clara Barton was the founder of the American Red Cross and is celebrated for her humanitarian work, particularly during the Civil War. Her contributions were vital to nursing and disaster relief, but she was not associated with the women’s suffrage movement or the founding of the National Woman's Party.