Which of the following statements (there could be more than one) is correct? If a statement is incorrect, provide a corrected version.
a. To calculate the monetary base, one must add currency held both inside financial intermediaries and outside financial intermediaries to the deposits that financial intermediaries hold at the central bank.
b. To calculate the monetary base, you do not have to know the level of customer deposits in the banking system.
c. To calculate the monetary base, one must determine only the amount that financial intermediaries hold in reserves, as the two terms (i.e., monetary base and reserves) mean the same thing.