The secession of south carolina from the union in 1860 was prompted by a) the election of abraham lincoln as president. eliminate b) the threat of the congress to abolish slavery. c) refusal of congress to pass the fugitive slave law. d) the invasion of south carolina by union forces at ft. sumter.

The correct answer is A. The secession of South Carolina from the Union in 1860 was prompted by  the election of Abraham Lincoln as President.

Explanation:

In 1860, the abolitionist Republican Abraham Lincoln won in the presidential elections of that year. South Carolina, fearing that Lincoln would definitively abolish slavery in the country, decided to separate from the United States on December 20 of that year, being the first American state to separate itself from the rest of the country. Subsequently, ten other states would also be separated from the United States, and immediately join to form the Confederate States of America.

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.

missouri compromise of 1820 which prohibited slavery