For white American treaty makers, Indian tribes were a revered as having the authority to organize and lead scattered Native Americans. b considered as an appropriate and efficient way to organize Native American scattered over thousands of miles. c a fiction of the white imagination. d a better alternative to the scattered bands that they had had in the past. e None of these choices are correct.

For the treaty makers of the United States, Indian tribes were one obstacle that prevented the government from executing their plans to disperse lands to new settlers. Expanding white settlements to increase land occupancy means intruding into the lands of Indian settlements.

But for the white treaty makers, these Indians were just a fiction of the white imagination. They were deemed unimportant and insignificant, and their lands 'grabbed' and dispersed off for the white settlers to occupy.

Thus, the correct answer is option c.