Piaget Believed That the Exact Timing of a Stage Reflects

Piaget believed that the exact timing of a stage reflects an interaction between the infant's ________ and __________.

A) level of physical maturation;the environment in which the child is raised
B) level of physical maturation;the genetic predisposition of the child
C) level of cognitive development;the experiences that are provided by the child's genotype
D) level of physical maturation;cognitive development of the child