Question

how did elizabeth cady stanton officially begin the womens suffrage movement?
she voted illegally in the presidential election of 1872.
she passed a law giving women the vote in new york.
she founded the american woman suffrage association.
she organized the seneca falls convention of 1848.

Explanation:

Elizabeth Cady Stanton is known for organizing the Seneca Falls Convention of 1848 which is considered the start of the women's suffrage movement in the US. Voting illegally in 1872 was Susan B. Anthony's act. Stanton didn't pass a law giving women the vote in New York. The American Woman Suffrage Association was founded later and by multiple people.

Answer:

She organized the Seneca Falls Convention of 1848.