Which feeling is most clearly present in Margie's school experience due to the absence of a human teacher?

Correct answer: Loneliness and boredom

The governing idea is that education includes human contact, companionship, and emotional engagement, not merely the delivery of correct answers. Margie studies alone at home with a mechanical teacher, so she has no classmates with whom she can talk, compare ideas, or share the ordinary excitement of a lesson. Her experience therefore becomes lonely and monotonous. Option D is correct because loneliness and boredom directly arise from isolated, machine-based learning. Lively excitement, collective pride, and classroom laughter suggest a lively social school, which is precisely what Margie lacks. Her interest in the old schools shows that she imagines human interaction as a missing source of joy.