Why were the Osage able to profit from the mineral reserves on their land, unlike other tribes in the Indian Territory?

The Osage were able to benefit from oil and other mineral wealth because they retained ownership of their land and its mineral rights. That meant the tribe, rather than outside landowners, could receive the proceeds from mineral leases and extraction. Choice D correctly identifies this legal advantage; the other choices do not explain why the Osage controlled the resource income.

AI-written and checked against the verified answer.