What kind of book was a telebook?

Correct answer: An electronic book read on a screen

In Isaac Asimov’s “The Fun They Had,” a telebook is a future form of electronic reading material displayed on a screen. Margie and Tommy normally study from such books, whose words can be read digitally rather than turned on paper pages. Therefore, option A is correct. Option B describes a material that the story never mentions, while option C belongs to an ancient form of record-keeping. Option D is also incorrect because telebooks contain written lessons and information, not pictures alone. The contrast between the screen-based telebook and Tommy’s old printed book highlights how technology has changed education and reading.