Several million Irish migrated into the United States in the 1840s primarily because Group of answer choices

the British military forced them to become refuges.

disastrous economic conditions, exacerbated by British government policies, pushed them out of the country.

poor environmental conditions, including volcanic eruptions and tsunamis, induced them to migrate.

they were attracted by the separation of church and state (freedom of religion) in the United States.

Spanish invasions threatened their homes.