Inmates at the Federal Penitentiary at Lompoc, California, Accepted Packages

Multiple Choice

Inmates at the federal penitentiary at Lompoc, California, accepted packages of mackerel in exchange for goods and services. What function do these packages of mackerel perform?

A) They function as a store of value.
B) They function as a medium of exchange.
C) They function as a unit of account.
D) They function as a factor of production.