Final answer:
The most often used and most flexible monetary tool used by the Federal Reserve is open market operations, which involve buying and selling government bonds to influence the federal funds rate.The right answer is option 3)
Step-by-step explanation:
The most often used and the most flexible monetary tool used by the Federal Reserve is open market operations. This traditional monetary policy tool involves buying and selling government bonds with banks to influence the quantity of bank reserves and the level of interest rates, specifically targeting the federal funds rate. Open market operations have been the most common monetary policy tool in the U.S. since the early 1920s. The second most common tool is the discount window lending, which allows banks to borrow from the Fed directly. Dynamic transactions involve short-term maneuvers intended to correct liquidity issues in the financial system. Although quantitative easing (QE) was used during the financial crisis and again in 2020, it is seen as an unconventional monetary tool, used when traditional operations are limited by lower-bound interest rates.