问题
单项选择题
The surplus value that results when a particular resource or product is fixed in supply and market price is higher than what is required to bring the resource or product onto the market and sustain its use can be defined as:（）
A. normal profit.
B. economic rent.
C. consumer surplus.
答案
参考答案：B
解析：
资源所有人获得的收入超过其提供该资源的机会成本时，其差额称为经济租金，题目中的解释就是经济租金的标准定义。