The correct answer to this open question is the following.
Although there are no options attached we can say the following.
The Sagebrush Rebellion took place against the policies of the federal government during the Carter administration. What evidence was apparent in the presidential election of 1976 that indicated the rebellion had already started against Carter before he was inaugurated?
Answer:
Jimmy Carter won the states west of the Missouri River, except Hawaii and Texas, despite all the arguments presented by his rival Geral Ford, during the Presidential election of 1976.
At the beginning of the 1970s, the Sagebrush Rebellion started as a movement that demanded changes to the US federal government in that western people wanted to have more control in the use of the land.
American people who lived in thirteen states of the west demanded more state and local control of the lands, including total control over those territories. They thought privatization was the best solution for their demands. A big portion of these lands was located in the sagebrush steppe.
So we could say President Jimmy Carter inherited the conflict from past administrations that could not resolve the issue.