问题
单项选择题
Which of the following is least likely to be the long-run effect of a price ceiling that is set below the equilibrium price（）
A. Sellers take bribes.
B. Suppliers discriminate.
C.Sellers improve quality.
答案
参考答案：C
解析：
Under price ceilings, sellers may reduce the quality of goods to a level that reflects the imposed ceiling price.