Why could Margie consider old school children lucky?

Correct answer: Because they had human teachers and classmates

The governing contrast in the story is between isolated mechanical instruction and shared human schooling. Margie studied alone at home with a mechanical teacher, and she disliked its fixed lessons and frequent tests. When she read about old schools, she imagined children sitting together, learning from a human teacher, talking, helping one another, and enjoying companionship. For this reason she could regard those children as lucky, so option A is correct. Option B is false because old-school children did study. Option C reverses the contrast: fast machines belonged to the future, not the source of Margie’s imagined happiness. Option D is also false, since books were part of old education. Her idea of luck comes from human contact and shared learning.