Which of the following BEST describes the primary cause of the Great Sioux War of 1876–1877?

A.
The Sioux launched a war on the Cheyenne.

B.
The Union Pacific laid track in the Black Hills.

C.
The Sioux attacked cattle ranchers in Oklahoma.

D.
The settlers wanted access to gold in the Black Hills.

SAY THE CORRECT ANSWER AND EXPLAIN WHY, DON'T GUESS

The correct answer is D. The settlers wanted access to gold in the Black Hills. The Great Sioux War of 1876–1877 was sparked by the discovery of gold in the Black Hills, which was part of the Sioux's traditional territory. The U.S. government wanted access to the gold and attempted to purchase the land from the Sioux, but the Sioux refused. This led to the U.S. government sending in troops to force the Sioux to cede the land, which resulted in the Great Sioux War.