In the story, technology had made children familiar with what?

Correct answer: Telebooks and screens

The story is set in a future where printed books have largely been replaced by telebooks. Children read from screens and are accustomed to lessons delivered through mechanical teachers. Margie is surprised when Tommy finds an old printed book, because its pages are fixed and do not move like the words on a screen. This contrast shows how normal digital technology has become for them.

Option A is correct because telebooks and screens are familiar parts of the children’s lives. Old school buildings, human teachers, and paper notebooks belong to the earlier system that seems strange to them. The detail is important because it establishes the technological setting and helps readers understand why Margie finds the traditional classroom so unusual and attractive.