Question

The first transcontinental railroad was largely built by

Answer 1

The correct answer would be letter A.

The first transcontinental railroad was largely built by Irish and Chinese immigrants. It was constructed with the help from the Chinese immigrants who were trying to escape from the poverty and terror in Guangdong and helping supervisory, engeneering and works that requires skills and expertise were done by Irish.

Answer 2

The first transcontinental railroad was largely built by Irish and Chinese immigrants. The correct option among all the options that are given in the question is the first option or option "a". Approximately two thirds of the workers were Chinese immigrants. I hope it helps you.