Final answer:
Glaucon uses the myth of the Ring of Gyges to examine whether people are just because of a deep commitment to morality or the fear of punishment, essentially testing our intuitions about morality.
Step-by-step explanation:
Glaucon mentions the myth of the Ring of Gyges to explore the question of why individuals act justly. Is it because of a genuine commitment to morality and justice, or do they do so out of fear of being punished? According to the myth, the ring grants the ability to become invisible at will, which would eliminate any fear of punishment for unjust acts. The story provokes us to consider if we would continue to act justly if there were no consequences for our actions. Thus, the intuition Glaucon is trying to jog is B. Morality. The myth is used as a thought experiment to debate whether justice is inherently valuable or simply a social necessity to avoid suffering consequences. The larger context involves Socrates' argument that true happiness comes from being just, rather than unjust, even if one could get away with injustices, suggesting that morality and justice are intrinsic to the good life.