Which statement best describes the effects of the 1851 Treaty of Fort Laramie? The Mormons moved to the eastern shore of the Great Salt Lake. Settlers began moving west in wagon trains across the Rocky Mountains. Mountain Men began using the Rocky Mountains for trapping. The Indians crossed artificial boundaries, setting the stage for conflict.

The correct option will be the last one: The Indians crossed artificial boundaries setting the stage for conflict. We know this because even though The US agreed to pay the various nations a cash payment every year as restitution for damage caused by white settlers' wagon trainsand the Native Americans agreed to limit themselves to a certain geographical area, to stop harassing white settlers, some people like the Lakota Sioux refused to abide by it.