How did money first come about?
A. Because using money was more efficient than bartering.
B. Goldsmiths realized that people wanted to keep their gold in their vaults for safekeeping. The goldsmiths would give a piece of paper that enabled the gold owners to collect their gold at any time. The pieces of paper eventually became money.
C. Credit and debit cards had not yet been invented.
D. None of the above.