That sounds as if scenario B precluded abiogenesis from happening ever again. After all, prebiotic Earth kind of was a thing which took negentropy and (eventually) converted it into order.
The question for B might then become, under which scenario is some sort of biogenesis more likely, one in which a papperclipper exists, or one in which it doesn't? The former includes the paperclipper itself as potential fodder for evolution, but (as was just pointed out) there's a chance the paperclipper might work to prevent it; while the latter has it for neither fodder nor interference, leaving things to natural processes.
At what point in biogenesis/evolution/etc do you think the Great Filter does its filtering?
Thought experiment:
Through whatever accident of history underlies these philosophical dilemmas, you are faced with a choice between two, and only two, mutually exclusive options:
* Choose A, and all life and sapience in the solar system (and presumably the universe), save for a sapient paperclipping AI, dies.
* Choose B, and all life and sapience in the solar system, including the paperclipping AI, dies.
Phrased another way: does the existence of any intelligence at all, even a paperclipper, have even the smallest amount of utility above no intelligence at all?
If anyone responds positively, subsequent questions would be which would be preferred, a paperclipper or a single bacteria; a paperclipper or a self-sustaining population of trilobites and their supporting ecology; a paperclipper or a self-sustaining population of australopithecines; and so forth, until the equivalent value is determined.