Beyond the Accomplishment of Symbol Use, Piaget's Description of the Preoperational

Beyond the accomplishment of symbol use, Piaget's description of the preoperational stage

A) focused mostly on all the things the preschool-age child cannot do.
B) attributed too high a level of cognitive skill to preschool children.
C) included his discovery that preschool children understand conservation.
D) included psychoanalytic and behavioral concepts.
E) focused primarily on solitary activities.