Deep River Manufacturing is one of many companies in an industry making a food product. Deep River units are identical up to the point they are labeled. Deep River produces its labeled brand, which sells for \(\$ 2.20\) per unit, and house brands for seven different grocery chains that sell for \(\$ 2.00\) per unit. Each grocery chain sells both the Deep River brand and its house brand. The best characterization of Deep River's market is:

A. oligopoly.

B. perfect competition.

C. monopolistic competition.