问题
单项选择题
Which of the following describes a market for goods or services that operates outside the legal system, trading at prices that exceed legally imposed price ceilings（）
A. An incidental market.
B. A black market.
C. A utilitarian market.
答案
参考答案：B
解析：
A black market is a market where trading takes place for legally prohibited goods or at prices that exceed legally imposed ceiling prices.