What is meant by the "tragedy of the commons"?
A. Many types of resources held and used by the public are overexploited for private gain.
B. Privately owned resources tend to be overexploited more than publicly owned resources.
C. Common resources, such as soil, are protected more than rare resources.
D. Governments place too much emphasis on regulating commonly held resources, restricting jobs and economic opportunities.
E. It is a tragedy that resources become more common when more people use them.