I think trenches had zigzag patterns because they could make people had a better aim at shot and more protection.
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Answer:
D) there was a drastic increase in immigration from central and eastern Europe than in the previous years
Explanation:
As you can see in the chart, the migration to the United states in the decade of 1881-1890 from the centrla and eastern Europe increased drastically, countries form central and Eastern Europe are France, Germany, Italy, France and the English territory, they overall experienced an increase of more of the 100% in immigration to the United States, so the option that is correct would be D) there was a drastic increase in immigration from central and eastern Europe than in the previous years
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