Concept:The central bank influences interest rates by controlling the amount of money available in the economy through the buying and selling of government securities, known as open market operations.
Explanation:The central bank uses open market operations to manage liquidity and steer interest rates.
When the central bank wants to reduce the money supply, it sells government securities to commercial banks and the public.
This action removes cash from the banking system, making credit scarcer and causing interest rates to rise.
Higher interest rates encourage saving and discourage excessive borrowing, which helps cool down inflation.
When the central bank wants to increase the money supply, it buys government securities from financial institutions.
This injects cash into the economy, increasing the funds available for lending.
As a result, interest rates fall, making borrowing cheaper and stimulating investment and spending.
Therefore, among the listed options, the tool directly used by the central bank to control the rate of interest is open market operation.
Answer:D. open market operation