What are "required reserves"? (Choose an answer from the list below; only one is correct.)

Group of answer choices

The minimum amount of reserves that a bank has to hold in the form of either "vault cash" or "deposits at the federal reserve".

The amount of government treasury bonds that banks are required to hold on their balance sheet.

The minimum amount of loans that a bank is required to make.

The minimum amount of equity that banks must have, as defined by the Basil II agreement.