In the story, technology had changed which feature of old schools?

Correct answer: Sitting and studying together

Technology changed the social arrangement of schooling by replacing the shared classroom with individual home study. In the future world, Margie sits alone in a room and learns from a mechanical teacher, whereas Tommy describes old schools where children went to a building, studied together and were taught by human teachers. Thus, option A is correct. Technology did not remove lessons altogether, because the machine still supplied lessons. Students still wrote answers, and the need to learn remained. The important change was not the existence of education but the way it was organised: communal learning became isolated, device-based learning. This contrast also explains why Margie finds the old schools fascinating.