Because of telebooks, what kind of reading were children used to?

Correct answer: Reading on screens

The governing concept is the change in reading habits produced by digital technology. In the futuristic setting, Margie and Tommy are familiar with telebooks, whose words appear on a screen and move or change as the reader progresses. Therefore, they are used to reading on screens, making option A correct. Printed pages are unfamiliar to them because the words remain fixed on paper, so option B reverses the evidence in the story. Stone tablets and wall writing are unrelated distractors. The old book therefore becomes important: it allows the children to compare flexible electronic reading with the stable, physical form of a printed book.