The economic behavior of a commercial bank to discount its unexpired commercial paper to the central bank to obtain funds is ( ). A: Rediscounting B: Interbank discounting C: Mortgage D: Asset securitization

If a country is confronted with the outflow of foreign exchanges and its central bank keeps selling foreign exchanges, the policy of ( ) can be adopted to stabilize money supply. A: Increasing rediscounting and relending B: Increasing the central bank notes issued C: Selling government bonds D: Raising required reserve ratio