Answer choice D

Hi @izzy, Thanks for the question! So first, I’ll diagram the stimulus. First, we’re told that humankind wouldn’t have survived (as it has) if our ancestors hadn’t been motivated by the desire to sacrifice themselves when doing so would ensure the survival of their children or other close relatives. OK this is kind of a long premise, but basically ~Ancestors have sacrificial desires in certain cases —> ~Humankind survived And the separate premise Humankind survived. Then we’re told that this kind of sacrifice is a form of altruism. So Sacrificial desires in certain cases —> Altruism We then conclude that our ancestors were at least partially altruistic. And that makes sense, since if we take the contrapositive of the first conditional HS —> ASDCC And we know humankind survived, so we can get ASDCC, and we know that was altruism. So the ancestors did altruistic things. Now we’re asked for a parallel argument. (D) says something like ~Replaced by alternative —> Natural resources depleted Replaced by alternative generally requires more power Conclusion: Natural resources depleted And this doesn’t really match what’s above. (A), on the other hand, does. It tells us ~Increase study time —> ~Raise grades Increase study time —> Good time management Raise grades (for some students) Conclusion: Manage time well (for some students) And that parallels the reasoning above. Hope this helps! Feel free to ask any other questions that you might have.

That makes sense. Thank you!