Then the girls had led her here, blindfolded still, through the corridors of Betsy Johnson's house and shut her in the cellar. It would be an hour before they came to get her, but then Rat Court would be all over and she would say what she had to say and go home. For tonight was the grand finale, the trial by fire. There really was no doubt now that she would get in. She could not think of anyone who had ever been invited into the high school sorority and failed to get through initiation time. But even so, her case would be quite different. She would see to that. She could not exactly say what had decided her revolt, but it definitely had something to do with Tracy and something to do with the heather birds

Then the girls had led her here, blindfolded still, through the corridors of Betsy Johnson's house and shut her in the cellar. It would be an hour before they came to get her, but then Rat Court would be all over and she would say what she had to say and go home. For tonight was the grand finale, the trial by fire.

Millicent's conflict over whether to join the sorority leads her to realize that she values her independence, her individuality, and her friendship with Tracy. She wants to be free like the heather birds, not part of the group.

it is correct because

Millicent’s conflict about whether to join the sorority

what Millicent is like as a character

how the conflict changes Millicent

the correct answer is:

this is an example of the writer telling through description rather than showing through dialogue.

sometimes writers like to explain explicitely what's happening instead of adding dialogues of the situations., which is the case in this passage,

the correct answer is a.a peer