Which did the most to bring the open range to an end?
1.building of the transcontinental railroad
2.danger of stampedes
3.building of barbed-wire fences
4.killing of buffalo

The correct answer is 3. What did the most to bring the open range to an end was the building of barbed-wire fences.

Explanation:

It was denominated "open range" to the vast extensions of earth without fencing, and therefore without owner, existing in the American West during the 1800s. These lands were used by cowboys to graze their cattle, and led to numerous conflicts over the ownership of these lands.

The use of barbed wire fences, with the consequent delimitation and aporpiacion of the lands, took to the end of the existence of the open range.

the answer is b.2008 and 2012 were presidential election years.

b)

it created free trade throughout the colonial territories.