Which excerpt from garrett hardin's "lifeboat ethics" uses an ethos audience appeal by admitting to an unpleasant side of his argument? a. let us now enrich the image, step by step, with substantive additions from the real world, a world that must solve real and pressing problems of overpopulation and hunger. b. but which 10 do we let in? how do we choose? do we pick the best 10, "first come, first served"? c. the harsh ethics of the lifeboat become even harsher when we consider the reproductive differences between the rich nations and the poor nations. d. the fundamental error of spaceship ethics, and the sharing it requires, is that it leads to what i call "the tragedy of the commons."