Use the excerpt to answer the question.

The question presented is whether an Indian tribe's police officer has authority to
detain temporarily and to search a non-Indian on a public right-of-way that runs
through an Indian reservation. The search and detention, we assume, took place
based on a potential violation of state or federal law prior to the suspect's transport to
the proper nontribal authorities for prosecution. We have previously noted that a tribe
retains inherent sovereign authority to address "conduct [that] threatens or has some
direct effect on the health or welfare of the tribe." We believe this statement of law
governs here. And we hold the tribal officer possesses the authority at issue."

According to this excerpt from the Supreme Court case United States v. Cooley
(2021), what legal precedent was established for tribal sovereignty by this ruling?

a. States do not have jurisdiction to prosecute crimes in areas previously promised to
Indigenous Americans despite legal traditions of state control.
b. Tribal areas are coequal with states, thus giving Indigenous Americans the same
power to tax and police.
c. Tribal areas are not foreign nations but wards or domestic dependent nations of the
U.S.
d. Tribal authority to police extends beyond Indigenous Americans to all U.S. citizens
who might be present on tribal land.

c. Tribal areas are not foreign nations but wards or domestic dependent nations of the U.S.