Instead of turning pages, what happened in a telebook?

Correct answer: Words changed on the screen

Option A is correct because the telebook was an electronic, screen-based form of reading. Margie and Tommy discover that the words of such a book appeared on a screen and moved or changed as the reader proceeded, so there were no physical pages to turn. This detail contrasts future technology with the old printed book that Tommy finds in the attic. Option B is absurd because the paper book is old and brittle, not burning. Option C is unrelated to the way a telebook functions, while option D describes an action by children rather than a feature of reading material. The question highlights the technological replacement of printed pages by an electronic display.