Answer:
Option(a) is correct.
Explanation:
Buying and selling of government bonds is a part of open market operations which is used by the Federal Reserve for controlling the money supply in an economy.
Selling the government bonds is a contractionary monetary policy that is used by the Federal reserve to reduce the money supply in the economy. This
This will reduce the inflation rate in an economy and shift the money supply curve leftwards. Hence, the value of money increases.