What Was One Reason That Compulsory Public Education Was Appealing

What was one reason that compulsory public education was appealing to the upper class?

A) It would defuse the potential threat of large numbers of poorly paid urban dwellers.
B) It would raise the lower class to a level closer to the upper class.
C) It would create a whole new workforce of professional teachers.
D) It would give the poor a chance to improve their living situation and better themselves.
E) It would allow poor children to learn how to think creatively and critically.