In a two-sided market, an intermediary firm that links the groups of producers and consumers is called: a

• The correct answer is c. A platform.

The concept known as platform is the entity or organization that is in between the transaction of buyers and sellers. That is to say, a platform is a connection between people who need a good or service and entities that can supply them with this good or service. Platforms work as intermediaries, help to facilitate transactions, and boost the trade. Currently, there is an increasing trend of online platforms that connect producers to consumers that are located not only in their country but also all around the world. Therefore, the correct answer is option c. On the other hand, option a. refers to the entity that runs a business, option b. is a type of market structure and option c. refers to the consumer.