Heat causes chemical reaction so that might be a way in which people use chemical properties to separate one substance from another substance .
Answer:
C - to divide and distribute land to American Indians
Explanation:
The Dawes Act of 1887 allowed the US to survey and divide up land for Native Americans. Any who accepted and lived apart from the trib would be granted US citizenship.
The economist John Maynard Keynes said that "<span>(A) Using government spending to increase consumer demand for goods"</span> was necessary to restart the economy during the Depression, since the private sector was unable to do so on its own.