Which of the following would hold true for all oligopolies?

A) Oligopolies sell a differentiated product
B) Oligopolies sell a large share of the market
C) Oligopolies face a horizontal demand curve
D) Oligopolies sell a product for which there are no close substitutes

Differentiated Product

A product that is distinguished from similar products in the market by unique characteristics or features, often leading to brand loyalty.

Horizontal Demand Curve

Represents a situation in economics where the demand for a good is extremely sensitive to changes in price, indicative of perfect elasticity.