Which groups provided most of the labor for the construction of the transcontinental railroad?
factory workers and homesteaders
native americans and texans
freemasons and union veterans
immigrants and african americans

The correct answer is D. Immigrants and African Americans

Explanation:

The Transcontinental railroad in the U.S. was a network of railroads that crossed the country and connected the areas in the Pacific Coast with those in the East. These railroads were built in the 19th century and guaranteed a cheaper and faster way to travel and transport goods.

In terms of construction, the first Transcontinental railroad took six years to be built; it was financed by both the government and private companies; and in this, mainly immigrants and Africans Americans participated. Indeed, Chinese immigrants and immigrants of other places played an important role in the construction of this railroad and also, it was common African Americans were hired as most were scaping after the end of the Civil War.