Answer:
Primarily disease working in conjunction with their weak immune systems.
Explanation:
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Explanation:
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The first farming settlements in China developed "along the rivers," since the rivers provided crucial irrigation for crops, which allowed for richer, more plentiful harvests.
This is true.
The Commodore, as he was nicknamed, got his start with ferries and then expanded into steel and other investments.
Carnegie accumulated a lot of money and gave a lot of it away but was also fairly criticized as being a robber baron.