The Kinked-shaped revenue curve of a firm relates to which one type of the market structure?

Correct option is B

The kinked demand curve is a theory used to explain the behavior of firms operating in an oligopoly market structure. In an oligopoly, there are only a few dominant firms that interact and compete with each other in the market.
The kinked demand curve suggests that in an oligopoly, firms face a demand curve that has a kink or a bend at the current market price. Above the kink, the demand curve is relatively elastic, meaning that if the firm increases its price, it will lose a significant portion of its market share to competitors. Below the kink, the demand curve is relatively inelastic, implying that if the firm lowers its price, competitors are unlikely to match the price decrease, resulting in limited gains in market share.
This kinked demand curve leads to a corresponding kinked-shaped revenue curve. The kinked-shaped revenue curve implies that small changes in price by the firm do not result in proportional changes in revenue. Instead, the firm's revenue remains relatively stable within a certain price range, as the rival firms tend to match price changes to avoid losing market share.