What accomplishment is sequoya known for?

select the best answer from the choices provided.
a. negotiating a treaty that allowed the cherokee to keep their land
b. founding the first cherokee-language christian church
c. filing a lawsuit on behalf of the cherokee to keep their land
d. developing a system of writing the cherokee language

lee and grant, both of whom held the highest rank in their respective armies, had known each other slightly during the mexican-american war (1846-48) and began their dialogue by exchanging awkward personal inquiries. characteristically, grant had arrived in his mud-splattered field uniform while lee had turned out in full dress attire, complete with sash and sword.

explanation: