If an industry evolves from monopolistic competition to oligopoly,we would expect:

A) the four-firm concentration ratio to decrease.
B) the four-firm concentration ratio to increase.
C) the four-firm concentration ratio to remain the same.
D) barriers to entry to weaken.

Monopolistic Competition

A market structure in which many firms sell products that are similar but not identical, allowing for some degree of market power.

Oligopoly

A market structure characterized by a small number of firms that have significant control over market prices and competition levels.

Barriers To Entry

Obstacles or hindrances that make it difficult for new competitors to enter a market or industry.