Are credit cards or debit cards money? Can you give a detailed example of why or why not?

"When the Fed makes an open market purchase of government securities, the quantity of money will eventually decrease by a fraction of the initial change in the monetary base." Is the previous statement correct or incorrect? 

Monetary policy is action taken by the Fed to influence the level of real GDP. Suppose the Fed wants to increase the money supply. What three tools could the Fed use to achieve this goal? Be specific in your answer and discuss the implications of this policy.