What part of the the passage best states hardin’s central argument
a. if we divide the world crudely into rich nations and poor nations, two thirds of them are desperately poor, and only on third comparatively rich, with the united states the wealthiest of all.
b. metaphorically each rich nation can be seen as a lifeboat full of comparatively rich people. in the ocean outside each lifeboat swim the poor of the world, and go would like to get in, or at least to share some of the wealth
c. first, we must recognize the limited capacity of any lifeboat
d. for example, a nations land has a limited capacity to support a population and as the current energy crisis has shown us, in some ways we have already exceeded the carrying capacity of our land.