In 1980, the Supreme Court ruled that ___.

the Sioux were to be repaid for all the gold taken from the Black Hills

the Sioux could take control of the Black Hills in 2020

the Black Hills were bought legally by the U.S. government

the U.S. occupation of the Black Hills was illegal

None of the given options are correct. In 1980, the Supreme Court did not rule on any of these matters related to the Sioux or the Black Hills.

In 1980, the Supreme Court ruled that the Sioux were to be repaid for all the gold taken from the Black Hills.

To find the answer to this question, we can start by searching for key information related to the Supreme Court ruling in 1980. One way to do this is by searching for "Supreme Court ruling in 1980." This will provide us with relevant information about any notable Supreme Court decisions from that year.

Upon conducting the search, we find that in 1980, the Supreme Court ruled on a case known as United States v. Sioux Nation of Indians. This case specifically involved the claim of the Sioux Nation regarding the Black Hills land in South Dakota. The Sioux argued that the U.S. government's seizure of the Black Hills in 1877 violated the Treaty of Fort Laramie, which guaranteed Sioux ownership of the land.

The Supreme Court's ruling in 1980 did not state that the Black Hills were bought legally by the U.S. government or that the U.S. occupation was illegal. Instead, the Court ruled that the Sioux were entitled to compensation for the unlawful taking of the land. However, the Court did not order the return of the Black Hills to the Sioux.

Therefore, the correct answer to the question is: the Sioux were to be repaid for all the gold taken from the Black Hills.