The correct answer is B Iroquois.
Ely Parker was technically a member of the Seneca tribe. However, the Seneca tribe was part of the Iroquois Confederacy that was established in New York state.Ely Parker was responsible for writing this letter because during the Civil War he was a secretary for General Ulysses S. Grant.
Benjamin Harrison lost the popular vote, but won the electoral college. Hope this helped. <span />
It was an important step toward this most precious freedom for American colonists.