Answer:
War, religious persecution, Economic crash
Explanation:
The Irish Migration was largely due to religious persecution and economic decline. War could easily cause a migration for fear of personal safety, we have seen an increase in immigrants from Central America and Syria in recent years. Religious freedom is partially what the US was founded on, it continues to be a life or death issue under ISIS and other organization who use religion as an excuse for violence. Economic crash leads to movement based on new opportunities.
In the 1800s im pretty sure that there was an increase in industrial growth so i dont think it that i think it could be b or c but i can't figure out which sorry<span>
</span>
The law abolished the National Origins Formula. Since they raised tax most criminals and the insane immigrated to America and that was the largest single decade increase of population for the U.S since 1860.
Answer:the answer is D.
Explanation: Documentaries are examples of primary sources.