Which of the following best states the main difference between a monopoly
and an oligopoly?
a. monopolies have a slightly lower level of market concentration
than oligopolies.
b. both monopolies and oligopolies involve a very low level of
competition.
o
c. oligopolies involve more than one company while monopolies
involve only one.
) d. neither a monopoly nor an oligopoly presents significant barriers
to entering the industry.