Answer: D. a counterclaim to the idea that most people are moral.
Explanation: a counterclaim is a claim made to rebut an idea, in this case that idea is that most people are moral, according to the excerpt this idea was in a lesson by Socrates. The counterclaim was made by a student named Glaucon who, by telling a story from Plato's Republic, expressed his argument about how the humans couldn't resist the temptation of evil if they knew no one would see them.
If you can only choose one, I'd say the third option is the correct answer.
D, or the 4th one. It combines the sentences effectively, without overusing words.
Where’s the options? i would gladly help !!!