Which of the following is in charge of the buying and selling of government securities by the Fed? a. The president b. Federal Open Market Committee (FOMC) c. Congress d. None of the above

In order to identify the correct answer, let's first understand the role of each given option: a. The president: The president of the United States is the head of the executive branch of the government and not directly involved in the buying and selling of government securities. b. Federal Open Market Committee (FOMC): The FOMC is the monetary policymaking body of the Federal Reserve System, which is responsible for the formulation of a policy designed to promote economic growth, full employment, stable prices, and a sustainable pattern of international trade and payments. c. Congress: Congress is the legislative branch of the United States federal government, responsible for making laws, levying taxes, and regulating commerce. It does not actively participate in the buying and selling of government securities. d. None of the above: This option implies that none of the given options handle the buying and selling of government securities by the Fed.

Based on the roles of each option, it becomes clear that the Federal Open Market Committee (FOMC) is responsible for conducting open market operations, which include the buying and selling of government securities to control the money supply and implement monetary policy. Therefore, the correct answer is: b. Federal Open Market Committee (FOMC)