问题
单项选择题
The symmetry principle refers to the idea that if an economy is organized under a fair set of rules:（）
A. the greatest good is achieved for the greatest number of people.
B. the wealth that individuals accumulate will become equal over time.
C. individuals receive goods and services equal in value to their economic contribution.
答案
参考答案：C
解析：
The symmetry principle asserts that under a fair set of rules, the goods and services that individuals receive from the economy will be equal in value to the contributions they make to the economy.