B. The installment plan. Where consumers were able to pay for products and services in installments.
My answer is- All but the most efficient answer would be to watch TV about the trends the other answer choices would be outdated (unless the newspapers are being updated every day)
Monopolistic markets are those in which a small number of strategically interacting enterprises produce the lion's share of the output.
The other end of the market structure spectrum, where there is only one firm, is called a monopoly. Monopolies possess monopoly power, or the capacity to alter the product's price. Market power, another name for monopoly power, is quantified by the Lerner Index. Monopolistic competition and oligopoly are the two intermediary market forms that are defined and discussed in this chapter. Market structure characterized by a differentiated product and flexibility of entry and exit is known as monopolistic competition. Monopolistically Competitive enterprises have two traits: one similar to a monopoly (a differentiated product gives it market strength) and the other to a competitive firm (freedom of entry and exit).
Learn more about Monopolistic here.
brainly.com/question/28202942
#SPJ4
.B is correct I just took the test