Final answer:
Emily Dickinson was not associated with the early nineteenth-century cause of women's rights; she was a poet and did not take a public role in this movement, unlike Lucy Stone, Lucretia Mott, Susan B. Anthony, and Elizabeth Cady Stanton. Therefore, the correct option is A.
Step-by-step explanation:
The individual not associated with the early nineteenth-century cause of women's rights among the choices provided is Emily Dickinson. While Lucy Stone, Lucretia Mott, Susan B. Anthony, and Elizabeth Cady Stanton were all prominent figures in the women's rights movement and had connections to the abolitionist movement, Emily Dickinson was a poet who did not have a public role in the women’s rights movement. Dickinson is best known for her unique and poignant poetry, much of which was published posthumously.