Answer:Many scholars believe that the collapse of the Indus Valley Civilization was caused by climate change. Some experts believe the drying of the Saraswati River, which began around 1900 BCE, was the main cause for climate change, while others conclude that a great flood struck the area.
Explanation:
1899, the United States declared the Open Door Policy. The Americans worried that other nations would soon divide China into formal colonies and shut out the American traders. They proposed that China's doors be open to merchants of all nations.
1000 per year
At its peak, nearly 1,000 enslaved people per year escaped from slave-holding states using the Underground Railroad – more than 5,000 court cases for escaped enslaved were recorded
The stock market crash and lost resources due to the war
The answer is A,This is your answer.
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