How did technology replace the human teacher in the story?

Correct answer: The mechanical teacher taught lessons

In the story’s future, education normally happens at home through a mechanical teacher. The machine displays lessons, asks questions, gives tests, and records the child’s progress. It performs many duties that a human classroom teacher used to perform. The County Inspector is called only when the machine develops a problem, not to teach Margie every day.

Option A is correct because the mechanical teacher has taken over the regular teaching role. An old book is simply a source of information, Tommy is another student, and the County Inspector is a repairer or specialist rather than a daily teacher. The replacement is therefore shown through the machine’s programmed instruction, although the story also reveals that technology cannot provide all the companionship of a human classroom.