单选题 Which of the following most accurately describes why firms under monopolistic competition face elastic demand for their products? A. High barriers to entry. B. The availability of many complementary goods. C. The availability of many close substitutes.

【正确答案】 C

【答案解析】The demand for products from firms competing in monopolistic competition is relatively elastic due to the availability of close substitutes. If a firm increases its product price, it will lose customers to firms selling slightly differentiated products at lower prices.