The essential difference between paper money and coins as forms of mon

The essential difference between paper money and coins as forms of money is that

A) paper money serves as a unit of account while coins do not.
B) the metallic content of coins makes them more acceptable as money.
C) paper is paper and not metal. The metal is more durable.
D) paper money issued by the Federal Reserve Board is backed by gold while coins are not.

ANSWER

C