How does the title create an irony of time?

Correct answer: A future child sees the ordinary school of the past as joyful

The governing concept is irony created by a reversal of perspective across time. Margie lives in the future, where children study alone with mechanical teachers, so she initially regards the old printed book as strange. As Tommy explains schools of the past, she imagines children learning together in a building and begins to think that such a system must have been enjoyable. The title refers to those old school days as “fun,” although modern readers may consider them ordinary. Option A is correct because it captures how a future child idealises an earlier form of education. Options B and D contradict the story, while C is an irrelevant detail and does not explain the title's irony.