Final answer:
Elizabeth Cady Stanton is the activist primarily known for fighting for women's suffrage. She played a key role in the early women's rights movement, co-founding the National Woman Suffrage Association, and was instrumental in the fight for the 19th Amendment. So, the correct answer is option 3.
Step-by-step explanation:
The activist primarily known for fighting for women to obtain the right to vote was Elizabeth Cady Stanton. She was a leading figure in the early women's rights movement and co-founded the National Woman Suffrage Association (NWSA) with Susan B.
Anthony, advocating strongly for a constitutional amendment to ensure women's suffrage. Elizabeth Cady Stanton was an exemplar of the progressive commitment to promoting democracy and social justice within the emerging leaders of the women's suffrage movement.
During the Seneca Falls Convention in 1848, Elizabeth Cady Stanton read the "Declaration of Sentiments," a document demanding suffrage for women, which was fashioned after the Declaration of Independence.
Stanton was an integral part of the women's suffrage movement, and her leadership helped to pave the way for the eventual passage of the 19th Amendment, which granted women the right to vote. Despite facing challenges and divisions over the 14th and 15th Amendments, which initially excluded women, activists like Stanton persisted in their fight for equal voting rights.