Which immigrant groups to were used to build the railroads

Although most of the companies' railroad workers were initially from Ireland and Union Pacific employed some native-born American soldiers, the vast majority of workers for Central Pacific were Chinese immigrants by the time the railroad was finished. These immigrants faced particularly poor working conditions and fierce discrimination, but their efforts were crucial to the construction of the railroad and to the full development of the West.

a they donate money to humanitarian causes

c   they volunteer to alleviate suffering

d   they blame all muslims for not being able to keep their fellow muslims in line.

the answer is b. hope this