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.
Several days after the bombing of pearl harbor, Adolf Hitler declared war on Germany in a show of support with the Japanese empire, it was the second biggest strategic mistake of the war, the first being the invasion of the Soviet Union.
Pretty sure it is C because it it divisible by 3. If you divide 15 you get 5 and if you divide 6 you get 2.
