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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.
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John Calvin and Martin Luther were two Christian religious leaders that broke with the Catholic Church and were leaders in the movement known as the Reformation. During this movement the Christian community split from the Catholic Church into other new denominations commonly known as protestantism.
I can't really help with #1, but #2 is C, #3 is C, and #4 is C. I think #1 is B, but I'm not 100% sure. Hope this at least helps in some way.
The US supported the Panamanian rebellion against Columbia in order to get a favorable deal to build the Panama Canal.
Okay, now what exactly do you not understand about this? I can go through with you and explain it