When we keep part of our wealth in a bank checking account, we are using money as a ________ because ________

A) store of value; we are holding the money to exchange for goods at a later time
B) medium of exchange; we are holding the money to gain interest earned
C) barter token; we are holding the money to exchange for goods at a later time
D) unit of account; we are holding the money to exchange for goods at a later time
E) unit of currency; we have agreed upon the value of the money with bank

A