问题如下：
Monopolistic competition is characterized by:
选项：
A.substitutes: none, pricing power: some, barriers to entry: low, nature of competition: marketing.
B.substitutes: good, pricing power: limited, barriers to entry: high, nature of competition: advertising
C.substitutes: good, pricing power: limited, barriers to entry: low, nature of competition: marketing
解释：
C is correct.
Good substitutes, limited pricing power, low barriers to entry and marketing of products are characteristics of monopolistic competition.
考点：垄断竞争市场
解析：垄断竞争市场上的商品是可以相互替代的。并且该市场的进入壁垒很低。厂商议价能力有限，因此要做市场推广营销。
老师，monopoly competition中，冲刺的表单里写的是，firm是many的，degree of difference of products是some，进入壁垒是relatively easy，然后价格的控制是price searcher，和现在这里的答案感觉不太一样呢。
