What is s the policy used most by the fed to change money supply

All four change the number of reserves in the trading regularity. Discount rate adjustments are performed by Reserve Banks and the Board of Governors.  

If the Fed purchases back circulated assurances (such as Treasury bills) from large banks and bonds traders, it raises the money supply in the hands of the people.

The buy and trade of bonds in the open market by a central bank--are an important means adopted by the Federal Reserve in the implementation of the financial system.

- "bill clinton ( the 42nd u.s. president, served in office from by low unemployment, declining crime rates and a budget surplus. during clinton's second term, the u.s. economy was healthy, unemployment was low and the nation experienced a major technology boom and the rise of the internet."

it would be that mali has the worst literacy rate than the others