An industry characterized by a few interdependent firms and by barriers to entry is called:

A) perfect competition.
B) monopolistic competition.
C) monopoly.
D) oligopoly.

Oligopoly

A market structure characterized by a small number of firms dominating the market, leading to limited competition and potentially higher prices.

Interdependent Firms

Companies whose strategies, actions or performances are mutually influenced or dependent on each other.

Barriers to Entry

Factors that make it difficult for new firms to enter a market, such as high start-up costs or strict regulations.