Answer and Explanation:
Amanda demonstrates listening to the details cited by Ethan. That's because the way Ethan talked about "The Monkey's Paw" made it appear that the White family was happy the way they lived and were even satisfied living in the Villa, that is, Ethan provided satisfactory details about the happiness of that family, which made Amanda conclude that the family life "sounded ... perfect".
Amanda's observation and Ethan's speech are enough to show that the students had prepared for this debate, as they had read and reflected on the story, before the time came to debate it, in fact, so they already had arguments and opinions formed about the narrative.