Which of the following events contributed to ending slavery in the U. S.?

the bloodey war-lincon

Explanation:

As the bloody war waged on, Lincoln issued his Emancipation Proclamation of 1863, calling for the freeing of enslaved people in areas of the rebellion. And in 1865, the Constitution was ratified to include the Thirteenth Amendment, which officially abolished all forms of slavery in the United States

The U.S. Civil War

Explanation:

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explanation:

in the 1800s, locomotives powered by steam made transportation faster and cheaper. the resulting rapid growth of railroads led to the connection of the atlantic and pacific railroad in oklahoma city in 1897.

in the last years of the century, the improvement of steam-based engines the expansion and growth of railroads. this growth increased when the companies started to build and expand, such as the atlantic and pacific railroad, which connected new mexico with california, and missouri with oklahoma. many of these new networks were built in oklahoma, and these changes transportation henceforward.