Question

Between 1845 and 1850, many people emigrated from Ireland to the United States. What prompted them to leave their home country?

Ireland was engaged in a fierce war with Britain.
Ireland was becoming severely overpopulated.
A viral epidemic was killing many Irish people.
A crop failure had led to a famine in Ireland.

Answer 1

D. A crop failure had led to a famine in Ireland.

Answer 2

The correct answer is A crop failure had led to a famine in Ireland.

The famine is called the Great Famine and caused not only much migration, but also caused many a person's death. That is one of the reason's why there are actually more Irish people in the US nowadays than in Ireland itself.