What change in reading method did the telebook show?

Correct answer: Children read on a screen

In Isaac Asimov’s story “The Fun They Had,” the telebook represents a future form of digital reading. Instead of turning printed pages in a traditional paper book, the child reads words from an electronic screen. Therefore option B is correct. The change is in the medium and method of reading: information is displayed technologically rather than printed on physical pages. Option A belongs to an imagined ancient writing method, option C changes reading into listening and is not what the telebook does, and option D has no connection with the story. The telebook also helps the writer contrast technologically advanced education with the old printed books Margie and Tommy discover. The question tests the story’s treatment of technology, not the general definition of a book.