Why Does Norcross Discuss the Aristotelian Criterion of Rationality

Why does Norcross discuss the Aristotelian criterion of rationality?

A) He thinks many contemporary philosophers offer variations on that idea when arguing for the moral superiority of humans.
B) He thinks that it supplies the criterion by which something is a moral patient.
C) He thinks that nonhuman animals satisfy that criterion, which is why consuming them is wrong.
D) He thinks that nonhuman animals and human beings are equally rational by that standard, which means their interests should be given equal weight.