Montessori's Idea of the "Prepared Environment" Means That

Montessori's idea of the "prepared environment" means that:

A) the school demonstrates a concern for the natural environment.
B) the school demonstrates concern for the man-made environment
C) the school makes sure that everything is prepared before the start of the day.
D) the school has child-sized furnishings and materials displayed on low shelves, allowing children to choose what they want and return the items when they have finished.