A, enslaved persons were too valuable for southern leaders to consider emancipation
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Answer:
Population growth, availability of cheap, fertile land, conomic opportunity, e.g., gold (California Gold Rush), logging, farming, freedom
Explanation:
There are multiple things that caused the beginning of World War I. However, there was a certain event that pushed the power of Europe on its edge and that was when Archduke Ferdinand was assassinated. This is the reason why Europe was being caught in the World War I.