According to the us supreme court ruling in worcester v. georgia,
a.) states could impose their laws on and negotiate with american indian tribes.
b.) only the federal government could negotiate treaties with american indians.
c.) american indian tribes were not sovereign nations and could not file suits.
d.) american indian tribes must accept any treaty offered by the us government.

The correct answer is b.) only the federal government could negotiate treaties with American Indians.

Georgia had banned non-natives from being on native american soil, so when Worcester broke that law, he was indicted and the supreme court freed him because they declared  that Indian land was sovereign and that Georgian laws about it were unconstitutional and  that only the federal government is allowed to negotiate with them.