Answer:
A) Oxen were used as the unit of account.
Step-by-step explanation:
The four main functions of money are:
- Medium of exchange: money can be used to exchange for other goods.
- Unit of account: money can represent the value of goods. In this case the oxen served as a measure of the value of goods.
- Standard of deferred payment: money can enable lending and borrowing since it can facilitate exchange over time.
- Store Value: at least in the short term, money must be able to hold its value.