What caution does the story teach about using technology?

Correct answer: Human relationships and collective experience should be preserved with technology

The central caution is not to confuse technological convenience with complete education. The story presents machines as capable of delivering lessons and checking work, but it also shows Margie studying alone and missing the social atmosphere of a traditional school. Technology should therefore be used as a helpful means while human relationships, discussion, cooperation, and shared experiences are protected. Option A expresses this practical and balanced lesson. Option B is too absolute because the machine has genuine educational usefulness. Option C reverses the implied value of human teachers and classmates. Option D is also unjustified: the printed book surprises the children, but it contains valuable knowledge and allows them to discover how earlier education worked. The warning concerns isolation, not technology itself.