Answer:
A.
Explanation:
I think it is A because the other reasons are just nonsense. Plus, A makes more sense because they wouldn't go down there to explore the Grand Canyon how they do today. I mean, maybe? But no. It's A. :)
They had to pay a 10$ fee to live there, sometimes 60$ and some people hunted buffolo for sport.
Would that be the question exact that u need help with