How did technology change the idea of classroom in the story?

Correct answer: The classroom became limited to a home room and machine

The governing concept is the transformation of the learning space. In the traditional model, a classroom is a shared place where many children meet a human teacher. In the future shown in the story, Margie studies in a special room at home, and the mechanical teacher provides instruction through its programmed system. Thus option A is correct: technology relocates and individualises the classroom, turning it into a home-based arrangement centred on a machine. Option B is unsupported because no field classroom is described. Option C is false because Margie continues to receive lessons, and option D confuses the object that creates curiosity with the meaning of a classroom. The change brings convenience but removes much of the social experience of schooling.