The Federal Backing for Money in the United States Comes

The Federal backing for money in the United States comes from

A) providing sufficient quantities of precious metals, such as gold and silver, to cover the amount of paper money in circulation.
B) pledging physical assets, such as land, natural resources, and public buildings, as collateral for outstanding currency.
C) controlling the money supply in order to keep the value of money relatively stable over time.
D) protecting checkable deposits at financial institutions with deposit guarantees.