Market Economy
Explanation:
The economic system which is used in the United States of America is known as Market Economy. Market Ecomomy is also known as Capitalistic Ecomomy.
The first polio vaccine was the inactivated polio vaccine, developed by Jonas Salk. The oral polio vaccine was developed by Albert Sabin.
The constitution is an example of primary source hope this helps!!!!!!
Winston Churchill- he was a prime minister of great Britain and believe in the the philosophy of democracy
True, All i did was look it up
