Question help what is the definition of​ monopoly?
a. a monopoly is a firm that is created and regulated by the government.
b. a monopoly is a firm that earns large economic profits.
c. a monopoly is a firm that is the only seller of a product in a given industry.
d. a monopoly is a firm that is the only seller of a product that can ignore the average total costthe average total cost of production.
e. all of the above.