The Grand Council of Native Americans was
formed to
A. settle disputes
B. decide how to share land
C. decide how to govern people
D. all of the above

D. all of the above

Explanation:

The Grand Council of Native Americans which has 50 chiefs, was formed to serve as the group or council that is responsible for maintaining peace among the members.

The council is also responsible for handling political and military matters including forging treaties with other Indian nations and declaring war.

Hence, the correct answer is option D "All of the above, " as they are responsible for settling disputes, deciding things of economic and political importance like how to share land and how to govern people.