Margie's final thought strengthens which message of the story?

Correct answer: Joy and company are important in learning

The correct answer is A. At the end of the story, Margie imagines the children of the past learning together in a school building. Her thought is not simply about printed books or an old-fashioned classroom; it is about the pleasure of sharing lessons, talking with classmates, and having a human teacher present. This connects directly with the title, because Margie begins to understand why the children in the past may have had more fun at school. Option B is wrong because the mechanical teacher does not experience happiness. Option C is contradicted by the value Margie discovers in the old book, and option D confuses her temporary difficulty with the story's larger message.