Final answer:
The Irish immigrants faced discrimination and violence during the transcontinental railroad construction. The Italians encountered hostility due to the Mafia stereotype. The Chinese experienced prejudice during the Potato Famine.
Step-by-step explanation:
The Irish immigrants faced discrimination and violence during the construction of the transcontinental railroad. Their Catholic religion and perceived threat to American jobs led to hostility towards them.
The Italian immigrants encountered hostility with the rise of the Mafia stereotype. Italians were often associated with organized crime, leading to prejudice and discrimination.
The Chinese immigrants experienced prejudice during the Potato Famine in Ireland. They faced racism and were blamed for taking jobs and lowering wages.