Concept:Deposits held by commercial banks are counted as part of the total money supply in an economy.
Explanation:Commercial banks accept deposits from individuals and businesses.
These deposits can be withdrawn on demand and are often used for making payments.
Such demand deposits are considered money because they serve as a medium of exchange.
The money supply includes currency in circulation plus these bank deposits.
Therefore, commercial bank deposits form a major component of the money supply.
Transfer payments, ordinary shares, and treasury bills are not the same as bank deposits.
Thus, the most appropriate option is A.
Answer:A. money supply