From where does Tommy get knowledge about the old school?

Correct answer: From an old book

The correct answer is B, “from an old book.” Tommy discovers a printed book in his house and reads about the schools that existed in the past. He then explains to Margie that children once went to a special building, learned together, and were taught by human teachers. The book is significant because it preserves information about an educational system that has disappeared by the time of the story. Option A is incorrect because no robot toy provides this information. Option C is incorrect because Margie’s mother is not Tommy’s source. Option D is also wrong: the County Inspector repairs Margie’s mechanical teacher but does not teach Tommy about old schools. The printed book therefore links the future world with its educational past.