Which of the following children shows awareness of classification hierarchies?
a) Paige, who draws a map of her neighborhood, complete with landmarks and streets
b) Nick, who enjoys lining all of his action figures up and arranging them from shortest to tallest
c) Isabel, who spends hours sorting and resorting her collection of bracelets, grouping them first by color, then by size, and finally by shape
d) Jorge, who pretends he is king and that his little brothers are the commoners who must do his will
