What creates the clash between educational memory and educational technology in the story?

Correct answer: The old printed book and the mechanical teacher

The correct answer is the old printed book and the mechanical teacher. The printed book, discovered by Tommy, preserves an earlier model of education in which children learned together from a common text and received guidance from a human teacher. Margie's mechanical teacher represents the technologically advanced future, where lessons are delivered individually on a screen and tests are automatically assessed. The contrast between these two objects creates the story's central comparison between communal schooling and isolated technological instruction. Margie's mother and Tommy are characters, not the educational symbols that produce the contrast. Geography and History are merely subjects, and the attic and kitchen are locations. Therefore, option A identifies both sides of the thematic clash.