问题
单项选择题
The law of diminishing returns states that for a given production process, as more and more of a resource (such as labor) are added, holding the quantities of other resources fixed:（）
A. cost declines at an increasing rate.
B. cost declines at a decreasing rate.
C. output increases at a decreasing rate.
答案
参考答案：C
解析：
The law of diminishing returns states that for a given production process, as more and more resources (such as labor) are added holding the quantities of other resources fixed, output in creases at a decreasing rate. This occurs because, at some point, adding more workers results in inefficiencies.