Final answer:
Socrates rejects Thrasymachus's claims and argues that true justice is a virtue. Option B is the correct answer.
Step-by-step explanation:
Socrates rejects Thrasymachus's claims and argues that true justice is a virtue.
Socrates believes that behaving justly provides the greatest avenue to happiness, and he sets out to prove this idea by using the analogy of the just city. If a just city is more successful than an unjust one, he argues, it follows that a just man will be more successful than an unjust man.
Based on these beliefs, Socrates concludes that Thrasymachus's claim that injustice is a virtue and the just man is naive is incorrect. Socrates argues that justice is inherently virtuous and that it leads to a more fulfilling and successful life.
So Option B is the correct answer.