Margie's experience shows which limitation of technology most simply?

A machine can teach, but cannot become a friend

The governing contrast in the story is between efficient instruction and human companionship. Margie's mechanical teacher can give her lessons at home, set tests, and check answers, so technology clearly performs several teaching and assessment functions. However, it cannot provide classmates with whom she can talk, cooperate, compete, or share the pleasure of learning. Option A is therefore the most accurate summary of the limitation. Options B and C are contradicted by the text because the machine checks her work and displays lessons. D is also false because the entire system is designed for use in the home. The point is not that technology is useless; rather, it cannot reproduce the emotional and social relationships that make education a shared human experience.

This is a Class 9 English question. Chapter: The Fun They Had. Topic: the importance of human teachers.