Piaget's Notion That His Cognitive Stages Represent an Invariant Developmental

Multiple Choice

Piaget's notion that his cognitive stages represent an invariant developmental sequence implies that

A) all children progress through these stages in precisely the same order
B) stages can never be skipped
C) each stage builds from its precedessor
D) all children progress through these stages in precisely the same order and stages can never be skipped
E) all of these