Answer:
Duopoly ( B )
Step-by-step explanation:
The term that describes a country's market whereby there are only two firms in any industry is ; Duopoly
A Duopoly economy is a type of economy whereby the entirety of an Economy is solely controlled/owned by a not more than two industries/companies, this type of economy can be said to be a form of Oligopoly in its simplest form. while a monopolistic competition involves just one company or industry controlling the economy