According to the concept of the tragedy of the commons, what happens to shared resources over time? a. they are safeguarded. b. they are sold for profit. c. they are protected from degradation. d. they are depleted.

I would believe the answer to this question is D. According to the concept of the tragedy of the commons, shared resources are used by more than one organism. Due to the large consumption of shared resources they start to be fewer and fewer in number and over time if we are not careful they will be depleted.