How does future technology become a way to understand old education in the story?

Correct answer: It creates comparison through which the value of old school appears

The governing literary technique is contrast. The story first shows Margie's highly technological education: she studies at home, receives lessons from a mechanical teacher, and works alone. When she and Tommy read about children who attended a common school and learned from a human teacher, readers can compare the two systems. This comparison makes the companionship, shared activity, and human guidance of the old school appear valuable to Margie. Therefore option A is correct. Option B is wrong because technology does not erase the idea of the old school; the printed book preserves it. Option C is opposite to the plot, and option D is unsupported because no human teacher returns in the story.