Which best describes why chinese workers were used to construct a trans continental railroad

Many immigrants from china shifted to US in search of  better livelihood during the mid nineteenth century and they were employed in the construction of Transcontinental railroads.

Explanation:

Many Chinese immigrants joined the construction company and they were employed in the construction of transcontinental rail rods which extended from Atlantic to Pacific coast.  They increased their standard of living and advanced to modernity but suffered a great back lash of racial discrimination.

Most of the young Chinese males who migrated from china to US were mostly from peasant families. Many loan companies started to operate which encouraged the Chinese to take loans in order to reach US and earn their livelihood. Americans who observed the plight of the Chinese observed them to be the rich source of cheap labor and employed them in the construction of transcontinental railroads.

the chinese communist party (ccp);

explanation:

congress also has implied powers, which derive from the necessary and proper clause of the constitution and permit congress "to make all laws which shall be necessary and proper for carrying into execution the foregoing powers, and all other powers vested by this constitution in the government of the united states.