How does the use of dialogue between Socrates and Glaucon contribute to the text?

A
Glaucon’s consistent agreement with Socrates encourages readers to view Socrates’ ideas favorably.
B
Socrates asserts his expertise while debating various ideas with Glaucon.
C
Glaucon finds flaws in Socrates’ arguments, which deepens the conversation between the two men.
D
Socrates is able to demonstrate how gaining knowledge is a fulfilling endeavor by answering Glaucon’s questions.