Answer:
The correct answer is option d.
Step-by-step explanation:
A leftward shift in the money demand curve would cause the demand for money to decline. As a result, the interest rate will fall and the equilibrium quantity of money will decline as well.
If the Fed wants to restore the interest rate to its original value, it has to decrease the money supply.
It needs to adopt a contractionary monetary policy. The fed can sell bonds in the open market, the payment made by the sellers will be deducted from their bank accounts.
This will decrease the reserves of the bank. This further decreases their lending capacity. As the supply of money decreases, the interest rate will increase.