The correct answer to this open question is the following.
Carrie Chapman's winning plan consisted of the following actions.
In a critical time when the efforts of the original leaders of the National American Women Suffrage Association were waning because Lucrettia Mott, Elizabeth Cady Stanton, and Susan B. Anthony had less participation due to their age, Carrie Chapman became the leader of the movement and gave it the right impulse with his plan that consisted of the following. 1) women in states with presidential vote would work to pass an amendment to allow women to vote. 2) women should press for a referendum to amend their state Constitution. 3) Southern states would focus on primary suffrage. Finally, in 1919, the US Congress passed the 19th Amendment to the United States Constitution that allowed women of America the right to vote in elections.