Answer: the first one... Germans bitterly resented the Treaty of Versailles and the heavy war costs.
Explanation:
Germany was seen as one of the "big enemies" during the war and the people who wrote the Treaty of Versailles made it extremely unfair to Germany. That would explain the reason as to why Germany would be so angry about it.
He miscalculated the size of the Earth by more than half.
Explanation:
The settlement of the Americas is widely accepted to have begun when Paleolithic hunter-gatherers entered North America from the North Asian Mammoth steppe via the Beringia land bridge, which had formed between northeastern Siberia and western Alaska due to the lowering of sea level during the Last Glacial Maximum
Industrialization in the north caused the civil war. The industrial revolution in the North, during the first few decades of the 19th century, brought about a machine age economy that relied on wage laborers, not slaves. I hope that this is the answer that you were looking for and it has helped you.