The correct answer is A) it granted tribes great control over resources in reservations.
The passage of the Indian Self-determination Act of 1975 meets a main demand of Native American advocacy groups in that it granted tribes great control over resources in reservations.
The Indian Self-determination Act of 1975 allows many departments of the United States federal government to support American Indians that live in reservations. The important issue here is that the tribes and their leaders have the liberty of managing those resources, giving them control of the funds. Among the departments that supported the Indian tribes are the Secretary of Health, of Education, and the Interior.